5x4 – 15x2 + 10x – 2x3 + 6x – 4 – (6x3 + 8x2 – 10x – 3x2 – 4x + 5)= 5x4 – 15x2 – 2x3 + 16x – 4 – 6x3 – 5x2 + 14x – 5= 5x4 – 8x3 – 20x2 + 30x - 9

Q31 of 116 Page 6

Simplify:

5x⁴ – 15x² + 10x – 2x³ + 6x – 4 – (6x³ + 8x² – 10x – 3x² – 4x + 5)

= 5x⁴ – 15x² – 2x³ + 16x – 4 – 6x³ – 5x² + 14x – 5

= 5x⁴ – 8x³ – 20x² + 30x - 9

Simplify:

Write the following squares of binomials as trinomias:

(i)

(ii)

(iii)

(iv)

(v)

(vi)

(vii)

(viii)

(ix)

(x)

(xi)

(xii)