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25x^{2}-60x+37
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25x^{2}-60x+37
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25x^{2}-40x+16-4\left(5x-4\right)+5
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(5x-4\right)^{2}.
25x^{2}-40x+16-20x+16+5
Use the distributive property to multiply -4 by 5x-4.
25x^{2}-60x+16+16+5
Combine -40x and -20x to get -60x.
25x^{2}-60x+32+5
Add 16 and 16 to get 32.
25x^{2}-60x+37
Add 32 and 5 to get 37.
25x^{2}-40x+16-4\left(5x-4\right)+5
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(5x-4\right)^{2}.
25x^{2}-40x+16-20x+16+5
Use the distributive property to multiply -4 by 5x-4.
25x^{2}-60x+16+16+5
Combine -40x and -20x to get -60x.
25x^{2}-60x+32+5
Add 16 and 16 to get 32.
25x^{2}-60x+37
Add 32 and 5 to get 37.
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