Q18 of 116 Page 6

Multiply and verify the answer for x = 1 and y = 2

= - 3x³y³bx + x²y⁴bx

= -3x⁴y³b + x³y⁴b

According to question:

When x = 1 and y = 2

= - 3 (1)⁴ (2)³ b + (1)³ (2)⁴ b

= - 3 (8) b + 3 (8) b

= 0

Find the product 24x²(1-2x) and evaluate its value for x=3

Find the product -3y (xy+y²) and find its value for x = 4 and y = 5

Multiply the monomial by the binomial and find the value of each for x=-1, y=0.25 and z=0.005:

(i) 15y² (2-3x)

(ii) -3x (y²+z²)

(iii) z² (x-y)

(iv) xz(x+y²)

Simplify: