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factor each polynomial. 1. t² + 8t + 12 2. n² + 7n + 12 3. p² + 9p + 20…

Question

factor each polynomial.

  1. t² + 8t + 12
  2. n² + 7n + 12
  3. p² + 9p + 20
  4. h² + 9h + 18
  5. n² + 3n - 18
  6. x² + 2x - 8
  7. y² - 5y - 6
  8. g² + 3g - 10
  9. r² + 4r - 12
  10. x² - x - 12
  11. w² - w - 6
  12. y² - 6y + 8
  13. x² - 8x + 15
  14. b² - 9b + 8

Explanation:

Response
  1. For \(t^{2}+8t + 12\):
  • Explanation:
  • Step1: Find two - numbers that multiply to 12 and add up to 8

The numbers are 2 and 6 since \(2\times6 = 12\) and \(2 + 6=8\).

  • Step2: Rewrite the middle term and factor by grouping

\(t^{2}+8t + 12=t^{2}+2t+6t + 12=t(t + 2)+6(t + 2)=(t + 2)(t + 6)\)

  1. For \(n^{2}+7n + 12\):
  • Explanation:
  • Step1: Find two - numbers that multiply to 12 and add up to 7

The numbers are 3 and 4 since \(3\times4 = 12\) and \(3+4 = 7\).

  • Step2: Rewrite the middle term and factor by grouping

\(n^{2}+7n + 12=n^{2}+3n+4n + 12=n(n + 3)+4(n + 3)=(n + 3)(n + 4)\)

  1. For \(p^{2}+9p + 20\):
  • Explanation:
  • Step1: Find two - numbers that multiply to 20 and add up to 9

The numbers are 4 and 5 since \(4\times5 = 20\) and \(4 + 5=9\).

  • Step2: Rewrite the middle term and factor by grouping

\(p^{2}+9p + 20=p^{2}+4p+5p + 20=p(p + 4)+5(p + 4)=(p + 4)(p + 5)\)

  1. For \(h^{2}+9h + 18\):
  • Explanation:
  • Step1: Find two - numbers that multiply to 18 and add up to 9

The numbers are 3 and 6 since \(3\times6 = 18\) and \(3+6 = 9\).

  • Step2: Rewrite the middle term and factor by grouping

\(h^{2}+9h + 18=h^{2}+3h+6h + 18=h(h + 3)+6(h + 3)=(h + 3)(h + 6)\)

  1. For \(n^{2}+3n-18\):
  • Explanation:
  • Step1: Find two - numbers that multiply to - 18 and add up to 3

The numbers are 6 and - 3 since \(6\times(-3)=-18\) and \(6+( - 3)=3\).

  • Step2: Rewrite the middle term and factor by grouping

\(n^{2}+3n-18=n^{2}+6n-3n-18=n(n + 6)-3(n + 6)=(n + 6)(n - 3)\)

  1. For \(x^{2}+2x-8\):
  • Explanation:
  • Step1: Find two - numbers that multiply to - 8 and add up to 2

The numbers are 4 and - 2 since \(4\times(-2)=-8\) and \(4+( - 2)=2\).

  • Step2: Rewrite the middle term and factor by grouping

\(x^{2}+2x-8=x^{2}+4x-2x-8=x(x + 4)-2(x + 4)=(x + 4)(x - 2)\)

  1. For \(y^{2}-5y-6\):
  • Explanation:
  • Step1: Find two - numbers that multiply to - 6 and add up to - 5

The numbers are - 6 and 1 since \((-6)\times1=-6\) and \(-6 + 1=-5\).

  • Step2: Rewrite the middle term and factor by grouping

\(y^{2}-5y-6=y^{2}-6y + y-6=y(y - 6)+1(y - 6)=(y - 6)(y+1)\)

  1. For \(g^{2}+3g-10\):
  • Explanation:
  • Step1: Find two - numbers that multiply to - 10 and add up to 3

The numbers are 5 and - 2 since \(5\times(-2)=-10\) and \(5+( - 2)=3\).

  • Step2: Rewrite the middle term and factor by grouping

\(g^{2}+3g-10=g^{2}+5g-2g-10=g(g + 5)-2(g + 5)=(g + 5)(g - 2)\)

  1. For \(r^{2}+4r-12\):
  • Explanation:
  • Step1: Find two - numbers that multiply to - 12 and add up to 4

The numbers are 6 and - 2 since \(6\times(-2)=-12\) and \(6+( - 2)=4\).

  • Step2: Rewrite the middle term and factor by grouping

\(r^{2}+4r-12=r^{2}+6r-2r-12=r(r + 6)-2(r + 6)=(r + 6)(r - 2)\)

  1. For \(x^{2}-x-12\):
  • Explanation:
  • Step1: Find two - numbers that multiply to - 12 and add up to - 1

The numbers are - 4 and 3 since \((-4)\times3=-12\) and \(-4 + 3=-1\).

  • Step2: Rewrite the middle term and factor by grouping

\(x^{2}-x-12=x^{2}-4x+3x-12=x(x - 4)+3(x - 4)=(x - 4)(x + 3)\)

  1. For \(w^{2}-w-6\):
  • Explanation:
  • Step1: Find two - numbers that multiply to - 6 and add up to - 1

The numbers are - 3 and 2 since \((-3)\times2=-6\) and \(-3 + 2=-1\).

  • Step2: Rewrite the middle term and factor by grouping

\(w^{2}-w-6=w^{2}-3w+2w-6=w(w - 3)+2(w - 3)=(w - 3)(w + 2)\)

  1. For \(y^{2}-6y + 8\):
  • **Exp…

Answer:

  1. \((t + 2)(t + 6)\)
  2. \((n + 3)(n + 4)\)
  3. \((p + 4)(p + 5)\)
  4. \((h + 3)(h + 6)\)
  5. \((n + 6)(n - 3)\)
  6. \((x + 4)(x - 2)\)
  7. \((y - 6)(y + 1)\)
  8. \((g + 5)(g - 2)\)
  9. \((r + 6)(r - 2)\)
  10. \((x - 4)(x + 3)\)
  11. \((w - 3)(w + 2)\)
  12. \((y - 4)(y - 2)\)
  13. \((x - 5)(x - 3)\)
  14. \((b - 8)(b - 1)\)