Question

10. AJ and Max are solving the same equation. One of them solves the

Answer 1

The student who made mistake is Max;he should have subtracted both sides by 9 in the first step.

Equation

AJ:

(x + 5)² + 9 = 25

(x + 5)² = 25 - 9

(x + 5)² = 16

√(x + 5)² = √16

x + 5 = ±16

x + 5 = ±4

x + 5 = 4 or x + 5 = -4

x = 4 -5 or -4 -5

x = -1 or -9

Max's work:

(x + 5)² + 9 = 25

x + 5 + 3 = ± 5

Therefore, the student who made mistake is Max;he should have subtracted both sides by 9 in the first step.

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