Answer:
1. 4
+ 26x² + 4x - 48
2. 2
- 23x² + 60x - 32
3.
+ 7
- 4x + 2
+ 14x² - 8
4. 2
+
- 28
+ 3x + 12
Explanation:
To multiply polynomials, simply distribute whatever's outside the largest set of parenthesis, then combine like terms.
1) Distribute the parenthesis (x + 6):
x(4x² + 2x - 8) + 6(4x² + 2x - 8)
4
+ 2x² -8x + 6(4x² + 2x -8)
4
+ 2x² -8x + 24x² + 12x - 48
Combine like terms:
4
+ 26x² + 4x - 48
2) Distribute the parenthesis (x - 8):
x(2x² - 7x + 4) + (-8)(2x² - 7x + 4)
2
- 7x² + 4x + (-8)(2x² - 7x + 4)
2
- 7x² + 4x + -16x² + 56x - 32
Combine like terms:
2
- 23x² + 60x - 32
3) Distribute the parenthesis (x + 2):
x(
+ 7x² - 4) + 2(
+ 7x² - 4)
+ 7
- 4x + 2(
+ 7x² - 4)
+ 7
- 4x + 2
+ 14x² - 8
No like terms to combine, so:
+ 7
- 4x + 2
+ 14x² - 8
4) Distribute the parenthesis (x + 4):
x(2
- 7
+ 3) + 4(2
- 7
+ 3)
2
- 7
+ 3x + 4(2
- 7
+ 3)
2
- 7
+ 3x + 8
- 28
+ 12
Combine like terms:
2
+
- 28
+ 3x + 12
hope this helps!