Final answer to the problem
$4a^2-25$
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Step-by-step Solution
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- Produit de binômes avec terme commun
- Méthode FOIL
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1
Apply the formula: $\left(a+b\right)\left(a+c\right)$$=a^2-b^2$, where $a=2a$, $b=5$, $c=-5$, $a+c=2a-5$ and $a+b=2a+5$
$\left(2a\right)^2-25$
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$\left(2a\right)^2-25$
Learn how to solve problems step by step online. Solve the product (2a+5)(2a-5). Apply the formula: \left(a+b\right)\left(a+c\right)=a^2-b^2, where a=2a, b=5, c=-5, a+c=2a-5 and a+b=2a+5. Apply the formula: \left(ab\right)^n=a^nb^n. Apply the formula: a^b=a^b, where a=2, b=2 and a^b=2^2.
Final answer to the problem
$4a^2-25$
