Question

(1.5m+0.7n)(1.5m-0.7n)​

Answer 1

Answer:

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Answer 2

Required Identity : (a+b)(a-b) = a² - b²

$\huge \rm(1.5m+0.7n)(1.5m-0.7n) \\ \\ \huge\to \tt {(1.5m)}^{2} - {(0.7n)}^{2} \\ \\ \huge\to \sf \red{2.25 {m}^{2}} - \red{ 0.49 {n}^{2} }$