Evaluate
-4x^{2}+23x-25
Expand
-4x^{2}+23x-25
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3x-\left(4x^{2}-20x+25\right)
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(2x-5\right)^{2}.
3x-4x^{2}+20x-25
To find the opposite of 4x^{2}-20x+25, find the opposite of each term.
23x-4x^{2}-25
Combine 3x and 20x to get 23x.
3x-\left(4x^{2}-20x+25\right)
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(2x-5\right)^{2}.
3x-4x^{2}+20x-25
To find the opposite of 4x^{2}-20x+25, find the opposite of each term.
23x-4x^{2}-25
Combine 3x and 20x to get 23x.
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