Question

ײ - 7× = 0 preciso de ajudaaaa​

Answer 1

Resposta:

x = 7 ou 0

7² - 7(7) = 0

49 - 49 = 0

0² - 7(0) = 0

0 - 0 = 0

Answer 2

0 e 7.

$\sf x^2 - 7x = 0\\\\x = \dfrac{-b\pm\sqrt{\Delta}}{2a}\\ \\\Delta = b^2-4ac$

a = 1

b = -7

c = 0

Δ = -7² - 4 * 1 * 0

Δ = 49 - 4 * 1 * 0

Δ = 49 - 0

Δ = 49

$\sf x = \dfrac{-7\pm\sqrt{49}}{2}$

$\sf x = \dfrac{-7\pm{7}}{2}$

$\sf x_{1} = \dfrac{7-7}{2}\\\\\sf\boxed{ x_{1} = 0}\\\\x_2 = \dfrac{7+7}{2}\\\\\boxed{x_2 = 7}$