Question

Expand.
Your answer should be a polynomial in standard form.
(5r+2)(5r-2)=

Answer 1

131.25

Explanation:

25r²-10r+10r-4=0

25r²-4=0 (Since -10 and 10 cancel each other out)

25r²=4

Divide both sides by 4 to get r² = 6.25

Square both sides to get r = 2.5

Plug 2.5 back into the equation to get the answer of 131.25