Question

Utilizando a fórmula resolutiva de Bhaskara, resolva a equação x( x - 7)= - 10​

Answer 1

beijos até mais e boa tarde

Answer 2

Resposta ↓

Conjunto solução: s = {8, -1}

Explicação passo a passo:

x . (x - 7) = - 10

x . x + x . ( - 7 ) = - 10

x² - 7x = - 10

x² - 7x + 10 = 0

Coeficientes:

a = 1

b = - 7

c = 10

Δ = b² - 4.a.c

Δ = (-7)² - 4.1.10

Δ = 49 - 40

Δ = 9

$x = \cfrac{-b\pm\sqrt{\Delta} }{2.a} \\\\\\x = \cfrac{7 \pm \sqrt{9} }{2} \\\\\\x' = \cfrac{7 + 9}{2} \\\\\\x' = \cfrac{16}{2} \\\\\\x' = 8\\\\\\x" = \cfrac{7 - 9}{2} \\\\\\x" = \cfrac{-2}{2} \\\\\\x" = - 1$

s = {8 , -1}