Question

(7√5 + 9√3)² = ?

What is the solution of this expression.??

Answer 1

Answer:

448 + 126root15

Step-by-step explanation:

(7root5 + 9root3)^2

using identity (x + y)^2 = x^2 +2xy +y^2

so,

(7root5)^2 + 2 (7root5) (9root3) + (9root3)^2

(49*5) + (126root15) + (81*3)

(245) + (126root15) + (243)

448 + 126root15