Evaluate
16-4x^{2}
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16-4x^{2}
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4\left(x^{2}+4\right)-4x^{2}\times 2
Multiply x and x to get x^{2}.
4x^{2}+16-4x^{2}\times 2
Use the distributive property to multiply 4 by x^{2}+4.
4x^{2}+16-8x^{2}
Multiply 4 and 2 to get 8.
-4x^{2}+16
Combine 4x^{2} and -8x^{2} to get -4x^{2}.
4\left(x^{2}+4\right)-4x^{2}\times 2
Multiply x and x to get x^{2}.
4x^{2}+16-4x^{2}\times 2
Use the distributive property to multiply 4 by x^{2}+4.
4x^{2}+16-8x^{2}
Multiply 4 and 2 to get 8.
-4x^{2}+16
Combine 4x^{2} and -8x^{2} to get -4x^{2}.
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