(2x+10) find value for x
2 answers:
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Area of a rectangle is length by width, width is x, length is x+8
x×(x+8)=240
x²+8x=240
x²+8x-240=0
Use the quadratic formula to solve
It is a distance so can't be negative, so the answer must be 12
x×(x+8)=240
x²+8x=240
x²+8x-240=0
Use the quadratic formula to solve
It is a distance so can't be negative, so the answer must be 12