7m(7m+8n)^{2} +(7m-8n)^{2}
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Answer:
brainliest please
Step-by-step explanation:
7m (49m² + 64n² + 112mn)+(49m² + 64n² - 112mn)
=7m*(49m² + 64n² + 112mn + 49m² + 64n² - 112mn)
=7m * ( 98m² + 128n²)
=686m³ + 896 mn²
= 16m(43m² + 56n²)=0
= 43m² + 56n² ans
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