Question

Multiply :- (5a-b) × (5a-b) *​

Answer 1

$\huge{ \text{ \purple{ ✿Solution}}}$

$\sf{(5a-b) × (5a-b) }$

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

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

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

Answer 2

formula (a-b)²=a²- 2ab+b²

(5a-b)×(5a-b)

=(5a-b)²

=(5a)²-2×5a×b+b²

=25a²-10ab+b²

hope it helps you