Question

the value of (9p-4q)² will be
​

Answer 1

$(9p - 4 {q})^{2} \\ 9 {p}^{2} + 4 {q}^{2} - 2 \times 9p \times 4q \\ 9 {p}^{2} + 4 {q}^{2} - 72pq$

$( {a - b)}^{2} = {a}^{2} + {b}^{2} - 2ab$

Answer 2

Question

The Value Of (9p-4q)² Will Be

Solution:-

${\boxed{\sf{By Using Identity \red{\ (a-b)²= a²+b²-2ab}}}}$

$\sf{→(9p-4q)²}$

$\sf{ → (9p)²+(4q)²-2(9p)(4q)}$

$\sf{ → 81p²+16q²+72pq}$

hope it helps ☺️