rachelkagamine rachelkagamine

11-03-2020
Mathematics

contestada

what is the value of z so that -9 and 9 are both solutions of x^2+z=103?

Respuesta :

11-03-2020

Answer:

Z = 22

Step-by-step explanation:

plug 9 into the equation

9^2 + z = 103

81 + z = 103

subtract 81 from both sides

z = 22

do the same with -9

since you are squaring -9 this still equals 81 so the answer is the same.

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