Question

expand using suitabale identity (4x+5)(4x +1)​

Answer 1

Answer:

16x²+24x+5 is the answer

Answer 2

$\Large{\color{blue}{\underline{\underline{Solution:-}}}}$

$\sf{\boxed{\red{(x+a)(x+b)=x^2+(a+b)x+ab}}}$

$\sf (4x+5)(4x +1) \\ \sf ⇒ (4x)^2+(5+1)(4x)+(5)(1) \\ \sf ⇒16x^2+4x+20x+5 \\ \sf ⇒16x^2+24x+25$