Rewrite the expression in the form k\cdot z^nk⋅z n k, dot, z, start superscript, n, end superscript. 3\sqrt[4] z\cdot 3z{^{^{\scriptsize\dfrac34}}}=3 4 z ⋅3z 4 3

Step-by-step explanation:

Given the expression , we are to write it in the form

Simply using the law of indices as shown;

According to indices, , hence;

Hence the expression in as is

- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

x²(- 2x² + 4x - 1) - 3x(- 2x² + 4x - 1) + 4(- 2x² + 4x - 1) ← distribute

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form

fist on the left goes with the third on the right. second on the left goes with the fourth on the right. third on the left goes with the second on the right. the fourth on the left goes with first on the right