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anonymous
 one year ago
will give medal for explanation and answer thanks
Subtract and simplify: (3x2 + 7) – (x2 – 6x + 4)
A.
4x2 + 3
B.
2x2 + 6x + 3
C.
4x2 – 6x + 3
D.
2x2 + 6x + 11
anonymous
 one year ago
will give medal for explanation and answer thanks Subtract and simplify: (3x2 + 7) – (x2 – 6x + 4) A. 4x2 + 3 B. 2x2 + 6x + 3 C. 4x2 – 6x + 3 D. 2x2 + 6x + 11

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Owlcoffee
 one year ago
Best ResponseYou've already chosen the best response.1There's an invisible "1" on the second polynomial, you can view it like this: \[(3x^2+7)+(1)(x^2 6x +4)\] And using the distributive property of arithmetics: \[3x^2+7x^2+6x4\] Now, I will do something I like to call, "agrupating the coefficients" which consists of, looking at the variables that are alike, for example, the x^2, and draw "common factor" between them, thus, agrupating the coefficients and making them easily operable: \[(31)x^2+6x +(74)\] And operating the parenthesis: \[2x^2+6x +3\]
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