1.

Multiply :- (5a-b) × (5a-b) *​

Answer»

\huge{ \text{ \purple{ ✿Solution}}}

\sf{(5a-b) × (5a-b) }

\sf{ = (5a - b) {}^{2} }

\sf{ = {(5a)}^{2} - 2 \times 5a \times b + {b}^{2} } \: \: \mathcal{ \blue{ \boxed{(a - b) {}^{2} = a {}^{2} - 2ab + {b}^{2} }}}

\sf{ \orange{ = 25 {a}^{2} - 10ab + {b}^{2} }}


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