Question

(i) (2x + 5)² + (2x - 5)(2x - 5) please give fast answer​

Answer 1

Answer:

$(2x + 5)^2+(2x - 5)(2x - 5)=8x^2+50$

Step-by-step explanation:

$(2x+5)^2+(2x-5)(2x-5)\\ \\ (2x+5)^2+(2x-5)^2$

We can use the identity,

                       $(a+b)^2+(a-b)^2=2(a^2+b^2)$

So,

         $a=2x\\ \\ b=5$

So,

              $(2x + 5)^2+(2x - 5)^2\\ \\ 2((2x)^{2} +(5)^2)\\ \\ 2(4x^2+25)\\ \\ 8x^2+50$