Question

A student says that if 5x2 = 20, then x must be equal to 2. Do you agree or disagree with the student? Justify your answer.

Answer 1

Answer: agree

Explanation:

5(2)=10•2=20

Answer 2

disagree

Explanation:

Given

5x² = 20 ( divide both sides by 5 )

x² = 4 ( take the square root of both sides )

x = ±
`√(4)` = ± 2

x = 2 or x = - 2 are the solutions to the equation