Q: What is 3x a number to the second power?

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x2 * -3x = -3x3

18x^8y^4

6x5

2x^8 x 3x^2 x -4x = -24x^11

x(3x+6) or 3x(x+2). Id recomend the second one.

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x2 * -3x = -3x3

3x

18x^8y^4

6x5

2x^8 x 3x^2 x -4x = -24x^11

8x to the second power times 3x to the second power (8x)2 + (3x)2 = 64x2 + 9x2 = 73x2 is one possibility, except the problem called for multiplication which would make the answer 64x squared times 9x squared = 576x to the fourth power It could also be read this way: 8x squared times 3x squared equals 24x to the fourth power. I wish my computer would do those cool little twos.

5

x(3x+6) or 3x(x+2). Id recomend the second one.

3x

(4x ^2 + 3) + (3x ^2 + 8) = ( 4x^2 + 3x^2 ) + (3+8) = 7x^2 + 11

This expression could be reordered as 1 + 3x + 2x2.

This depends on how you place the parenthses- do you mean (3x) all to the second power or 3 times x to the second? In the first case, the 3 becomes 9 and so the answer is 9 times 25= 225. In the second case, the answer is 3 times 25 = 75.