Evaluate
16x^{2}+20x-1
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16x^{2}+20x-1
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4x^{2}-1+4x\left(5+3x\right)
Add 2 and 3 to get 5.
4x^{2}-1+20x+12x^{2}
Use the distributive property to multiply 4x by 5+3x.
16x^{2}-1+20x
Combine 4x^{2} and 12x^{2} to get 16x^{2}.
4x^{2}-1+4x\left(5+3x\right)
Add 2 and 3 to get 5.
4x^{2}-1+20x+12x^{2}
Use the distributive property to multiply 4x by 5+3x.
16x^{2}-1+20x
Combine 4x^{2} and 12x^{2} to get 16x^{2}.
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