The area of a rectangle can be represented by the expression 10x^2+41x+21. Which of the following expressions could represent the length of the rectangle? Group of answer choices

2x-7

2x+3

5x+7

5x+3

I'll do the first one for you. it isn't very hard at all.on number one, you have (50 × 3), which equals 150, and (3 × 3), which equals 9. after you establish that, you add 150 and 9 together. so, (150 + 9) equals 159.this means that 53 × 3 = 159.