Skip to main content
Solve for r
Tick mark Image
Solve for x
Tick mark Image

Similar Problems from Web Search

Share

r=9x^{2}-12x+4-\left(2x+1\right)^{2}
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(3x-2\right)^{2}.
r=9x^{2}-12x+4-\left(4x^{2}+4x+1\right)
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(2x+1\right)^{2}.
r=9x^{2}-12x+4-4x^{2}-4x-1
To find the opposite of 4x^{2}+4x+1, find the opposite of each term.
r=5x^{2}-12x+4-4x-1
Combine 9x^{2} and -4x^{2} to get 5x^{2}.
r=5x^{2}-16x+4-1
Combine -12x and -4x to get -16x.
r=5x^{2}-16x+3
Subtract 1 from 4 to get 3.