Question

10.Factorise: (i) 27x⁴ + 343x

(ii) 9x² + 16y² + 4z² − 24xy + 16yz – 12xz

(iii) x² + 1/x²+ 2 – 2x −2/x

(iv) 27 – 125a³ − 135a² + 225a

(v) 64a³ + 343b³​

Answer 1

Answer:

(i)

27x^4+343x

=x(27x^3+343)

Answer 2

Answer:

(i)   x(27x³ + 343)

(ii)   (3x+4y+2z)²

(iii)   (x+1/x)(x+1/x-2)

(iv)   (3-5a)³

(v)   (8a-7b)³ -168ab (8a+7b)​