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The area of a rectangular school yard is given by the equation x2 + 19x + 90 as measured in square yards. The teacher wants you to run the length. How far will you run if x = 30?

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TNSKermit

Answer:

-4 or -15

Step-by-step explanation:

Let's solve your equation step-by-step.

x^2+19x+90=30

Step 1: Subtract 30 from both sides.

x^2+19x+90−30=30−30

x^2+19x+60=0

Step 2: Factor left side of equation.

(x+4)(x+15)=0

Step 3: Set factors equal to 0.

x+4=0 or x+15=0

x=−4 or x=−15

Answer:

x=−4 or x=−15

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