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Basic Math
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Trigonometric Functions
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Example
3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b
Question
$$\{(x+5)^{2}-x^{2}\}$$
Evaluate
$10x+25$
Solution Steps
Use binomial theorem $\left(a+b\right)^{2}=a^{2}+2ab+b^{2}$ to expand $\left(x+5\right)^{2}$.
$$x^{2}+10x+25-x^{2}$$
Combine $x^{2}$ and $-x^{2}$ to get $0$.
$$10x+25$$
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Expand
$10x+25$
Solution Steps
Use binomial theorem $\left(a+b\right)^{2}=a^{2}+2ab+b^{2}$ to expand $\left(x+5\right)^{2}$.
$$x^{2}+10x+25-x^{2}$$
Combine $x^{2}$ and $-x^{2}$ to get $0$.
$$10x+25$$
Show Solution
Hide Solution
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