Question

Onsider the expression below when answering the questions that follow.

Simplify the above expression, and write your answer in descending powers of x. (3)
Write down the constant term.
If x=-1, evaluate the expression.
ESTION 6; [11 marks)
e the following equations:
72 = 6(x + 1)
on 3
x = -3 and y = 4 find the value of:
x(3x+4y)
mplify
-1 6x² + 2x² + 4x
(2

Answer 1

To simplify the expression -16x + 3x^2 - 8x^2, we should combine like terms and write the terms in descending powers of x. There is no constant term in this expression. If x = -1, the value of the expression -5x^2 - 16x is 11.

Step-by-step explanation:

To simplify the expression -16x + 3x^2 - 8x^2, we should combine like terms. Adding the coefficients of x^2, we get -16x + 3x^2 - 8x^2 = -16x - 5x^2. Writing the terms in descending powers of x, we have -5x^2 - 16x.

The constant term is the term that does not contain any powers of x. In this expression, the constant term is 0 since there is no constant term.

If we substitute x = -1 into the expression -5x^2 - 16x, we get -5(-1)^2 - 16(-1) = -5 - (-16) = -5 + 16 = 11.

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