Equations

We want to determine whether $x=-1$`x`=−1 is a solution to the equation $\left(x-4\right)^2=25$(`x`−4)2=25, by using substitution.

a

Substitute $x=-1$`x`=−1 into the expression $\left(x-4\right)^2$(`x`−4)2:

b

Is $x=-1$`x`=−1 a solution to the equation $\left(x-4\right)^2=25$(`x`−4)2=25?

No

A

Yes

B

No

A

Yes

B

Easy

Approx 2 minutes

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Solve first-degree equations involving one variable, including equations with fractional coefficients