Evaluate
25x^{2}+11x-16y^{2}
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25x^{2}+11x-16y^{2}
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25x^{2}+20xy+15x-20yx-16y^{2}-12y-4x+12y
Apply the distributive property by multiplying each term of 5x-4y by each term of 5x+4y+3.
25x^{2}+15x-16y^{2}-12y-4x+12y
Combine 20xy and -20yx to get 0.
25x^{2}+11x-16y^{2}-12y+12y
Combine 15x and -4x to get 11x.
25x^{2}+11x-16y^{2}
Combine -12y and 12y to get 0.
25x^{2}+20xy+15x-20yx-16y^{2}-12y-4x+12y
Apply the distributive property by multiplying each term of 5x-4y by each term of 5x+4y+3.
25x^{2}+15x-16y^{2}-12y-4x+12y
Combine 20xy and -20yx to get 0.
25x^{2}+11x-16y^{2}-12y+12y
Combine 15x and -4x to get 11x.
25x^{2}+11x-16y^{2}
Combine -12y and 12y to get 0.
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