Question

the area of a rectangle can be expressed by 2x^2-7x-4 if the rectangle has an area of 45 find the positive value for x

Answer 1

x^2 + 8x +15 is the area

x+5 is the length

x+3 is the width

(x+5)(x+3)=

x^2 + 3x +5x +15

x^2 +8x + 15

Explanation: