Question

If (x2 + 3x + 5) (x2 – 3x + 5) = m² – nạ, then m
is
(A) x2 – 3x
(B) 3x
(C) x2 + 5
(D) x2 + 2x + 1
plz explain it ​

Answer 1

fdffddddddddddddddddddddddddddddddddddddddddddd

Answer 2

Given : (x

2

+3x+5)(x

2

−3x+5)= m

2

−n

2

We know that, m

2

−n

2

=(m+n)(m−n) [Identity]

We can write above equation as,

⇒ (x

2

+3x+5)(x

2

−3x+5)=((x

2

+5)+3x)((x

2

+5)−3x)

⇒ (x

2

+3x+5)(x

2

−3x+5)=(x

2

+5)

2

−(3x)

2

Therefore, m=x

2

+5 and n=3x