Question

(i) (7x + 3) (7x – 4) = 49 x2 – 7x - 12
(ii) (a – 1)2 = a2 – 1.
(iii) (x2 + y2)(y2 + x2) = (x2 + y2)2
(iv) 2p is the factor of 8pq.

explain this.​

Answer 1

(i) (7x + 3) (7x – 4) = 49 x2 – 7x - 12 - TRUE

ii) (a – 1)2 = a2 – 1. - FALSE

(iii) (x2 + y2)(y2 + x2) = (x2 + y2)2

= (X^2 + Y^2)/(X^2 - Y^2)

= 3^2 + 2^2 / 3^2 - 2^2

= 9 + 4 / 9 - 4

= 13/5

(iv) 2p is the factor of 8pq - TRUE