<u>Answer</u>
Part 1 = -441
Part 2 = -539
Explanation
(p.q)(5) = (-2x+1)(2x²-1)
= (-2x×2x²)-(-2x×1)+(1×2x²)-(1×1)
= -4x³+2x+2x²-1
= -4x³+2x²+2x-1
Substituting x witj 5;
-4×5³+2×5²+2×5-1
-441
part 2
(q.p)(5) = (2x²-1)(-2x+1)
= (2x²×-2x)-(2x²×1)-(1×-2x)+(1×1)
= -4x³-2x²+2x+1
Substituting x with 5;
-4×5³-2×5²+2×5+1
-539
The difference between an algebraic expression and a numerical expression is that algebraic expressions contain numbers and variables. Numerical expressions only contain numbers.
Ex:
Algebraic Expression- 5x+9
Numerical Expression- 4+2
X=6
have a good day! :)
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2x. +5 = 7+5
2x=12
X=6
Replace all x's with the value of x.
f(x) = -2x becomes f(3) = -2(3)
f(3) = -2(3)
f(3) = -6
So, -6 is the answer.
