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Ierofanga [76]
3 years ago
12

Expand.If necessary, combine like terms.(2+7x)(2-7x)stuck? Watch a vide​

Mathematics
2 answers:
m_a_m_a [10]3 years ago
8 0

Answer:4-49x^2

Step-by-step explanation:

2^2-(7x)^2= given ans

scoray [572]3 years ago
3 0

Answer:

\boxed{\bold{-49x^2+4}}

Explanation:

Apply Difference of Two Squares Formula: \bold{\left(a+b\right)\left(a-b\right)=a^2-b^2}

\bold{a=2,\:b=7x}

= \bold{2^2-\left(7x\right)^2}

Simplify \bold{2^2-\left(7x\right)^2: \ -49x^2+4}

\boxed{\bold{-49x^2+4}}

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