(5b^2+7a^2)(5b^2+7a^2)?
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Answer:
25b^4 + 49 a^4 + 70a²b²
Step-by-step explanation:
(5b² +7a²) (5b²+ 7a²)
=(5b² +7a²) ² [use formula (a+b)²]
= (5b²)²+(7a²) ²+2 x 5b² x7a²
= 25b^4 +49a^4 + 70a²b²
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