Question

xsquare-8x+15 by completing the square method

Answer 1

Answer:

3 & 5

Step-by-step explanation:

X^2 -8X + 15 = 0

Adding both sides (8^2/4 = 16)

X^2 - 8X + 16 +15 = 16

X^2 -8X + 4^2 = 1

(X-4)^2 = 1

X-4 = +/- 1

X = 5 & 3

X^2 - 8X + 15 = 0

X^2 - 5X - 3X + 15 = 0

X(X-5)-3(X-5) = 0

(X-3)(X-5) = 0

X = 3 & 5

Answer 2

Q) x²-8x+15

Answer:- x²-3x-5x+15 ( I am factorizing it using the middle term splitting technique )

=x(x-3)-5(x-3)
=(x-5) (x-3)

So, 1) x-5=0
x=5

2) x-3=0
x=3