If k(x)=2x2-3x, find k(9).
1 answer:
You might be interested in
Answer:
Choice A) a² - 9a - 11.
Step-by-step explanation:
Separate the terms by the power of the variable, .
Terms with power 2 on :
- First equation: 6a²;
- Second equation: -5a².
Terms with power 1 on :
- First equation: -17a;
- Second equation: 8a.
Terms with power 0 on , which are also known as constant terms:
- First equation:
;
- Second equation:
.
Apply the distributive property of multiplication in reverse. In other words, factor out terms with the same power and add the coefficients.
Terms with power 2 on :
.
Terms with power 1 on :
.
Constant terms:
.
Add the sum of the individual terms to find the sum of the two polynomials:
.