Question

1.Simplify the following expressions:

(i) (x + y + z)(x + y – z)

(ii) x2

(x – 3y2

) – xy(y2 – 2xy) – x(y3 – 5x2

)

(iii) 2x2

(x + 2) – 3x (x2 – 3) – 5x(x + 5)​

Answer 1

x^2y^2-z^2 answer of first question