Expand
3x^{2}+42x+151
Evaluate
3\left(x+7\right)^{2}+4
Graph
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3\left(x^{2}+14x+49\right)+4
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(x+7\right)^{2}.
3x^{2}+42x+147+4
Use the distributive property to multiply 3 by x^{2}+14x+49.
3x^{2}+42x+151
Add 147 and 4 to get 151.
3\left(x^{2}+14x+49\right)+4
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(x+7\right)^{2}.
3x^{2}+42x+147+4
Use the distributive property to multiply 3 by x^{2}+14x+49.
3x^{2}+42x+151
Add 147 and 4 to get 151.
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