Question

1. a² = h² + x²

complete

1. h² =

a² - x²
complete

1. c² = h² +

(b - x)²
complete

1. c² = h² +

b² - 2bx + x²
done

Explanation:

Step1: Expand \((b - x)^2\)

According to the formula \((m - n)^2=m^{2}-2mn + n^{2}\), when \(m = b\) and \(n=x\), we have \((b - x)^2=b^{2}-2bx+x^{2}\)

Answer:

Expand \((b - x)^2\)