Arionna S.
asked • 06/03/21What is the sum of: 5x2-2-x and 7x+8+3x2
What is the difference of: 6x-x4-8x3 and 2x3+7-x
Determine the product of: 5x+3 and 8x2+8x+2
Kevin C. answered • 06/03/21
Highly Educated High School Math Teacher with Experience in STEM
Sum
(5x2-2-x) + (7x+8+3x2) = 8x2 + 6x + 6
Difference
(6x-x4-8x3) - (2x3+7-x) = 6x-x4-8x3-2x3-7+x = -x4-10x3+7x-7
Product
(5x - 3)(8x2+8x+2)
5x(8x2+8x+2) + 3(8x2+8x+2) = 40x3+40x2+10x +24x2 +24x +6
= 40x3 + 64x2 + 34x + 6
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