Question

spilt the equation 2 x square - 25

Answer 1

2x^2 - 25

2x^2 - 5^2

(√2x)^2 - 5^2

(√2x + 5)(√2x - 5) [a^2 - b^2 = (a - b)(a + b)]

Ans. x = -5/√2 and 5/√2

Answer 2

Let f (y) =2x²-25
compare x²=2
2x²-25=√2²-5²
!
√2+5. √2-5
X= -5/√2
5/√2