Question

Which of the following represent the area of a rectangle whose length is 5x-3 with is x +7
A. 5x^2-21
B.5x^2+9x-21
C.5x^2+32x-21
D.5x^2-32x-21

Answer 1

Area of a rectangle equals l×w

(5x-3)(x+7)
Distribution
5x2+35x-3x-21
5x2+32x-21
The answer is c

Answer 2

Area of Rectangle
= L x B
= (5x - 3)(x + 7)
= 5x² + 35x - 3x - 21
= 5x² + 32x - 21

∴ Answer is C.