Question

presciso pra agora ....Obrigada

Answer 1

teorema de pitagoras: hipotenusa² = cateto² + cateto²

a) 20² = 4X² + 3X²
400 = 7X²
400/7 =X²
20√7/ 7 = X

b)(3√5)² =6² + X²
9x5 = 36 +X²
45 = 36 + x²
45-36 = x²
9 = x²
3 = x

c)(x+1)² = x² + (√7)²
x² + 2 x X x 1 + 1² = x² + 7
x² + 2x + 1 = x² + 7
2x = 7-1
2x = 6
x = 3

d)(3√2)² = x² + x²
3x2 = x² + x²
6 =2x²
6/2 = x²
3 = x²
√3 = x