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Sylvia Christian
18 June, 10:29
Find the sum of 4x^3+2x^2-4x+3 and 7x^3-4x^2+7x+8
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Delilah
18 June, 11:02
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The sum means addition.
Add the like terms together.
4x^3+2x^2-4x+3
+ 7x^3-4x^2+7x+8
4x^3 + 7x^3 = 11x^3
2x^2 + - 4x^2 = - 2x^2
-4x + 7x = 3x
3 + 8 = 11
The answer is : 11x^3 - 2x^2 + 3x + 11
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Brewster
18 June, 14:01
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Answer: 3a^3 + 4a^2 - a + 5
Step-by-step explanation:
1. (4x^3 + 2x^2 - 4x + 3) + (7x^3 - 4x^2 + 7x + 8)
combine terms with same exponent;
(4x^3 + 7x^3) + (2x^2 - 4x^2) + (-4x + 7x) + (3 + 8)
= 11x^3 + (-2x^2) + 3x + 11
= 11x^3 - 2x^2 + 3x + 11 ... final answer
2. 3a^3 + 8a - 6 and 4a^2 - 9a + 11
combine terms with same exponent;
3a^3 + 4a^2 + (8a - 9a) + (-6 + 11)
= 3a^3 + 4a^2 + (-a) + 5
= 3a^3 + 4a^2 - a + 5 ... final answer
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