Question

evaluate the expression when y = 6. y^2 + 7y - 6

Explanation:

Step1: Substitute y value

Substitute $y = 6$ into $y^{2}+7y - 6$, we get $6^{2}+7\times6-6$.

Step2: Calculate powers

Calculate $6^{2}=36$, so the expression becomes $36 + 7\times6-6$.

Step3: Calculate multiplication

Calculate $7\times6 = 42$, then the expression is $36+42 - 6$.

Step4: Calculate addition and subtraction

$36+42=78$, and $78-6 = 72$.

Answer:

72