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Q: What does x equal in 2x squared plus 6 equals 30?

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It equals 53X- a number is squared when it is multiplied by itself, so 7X by 7X = 49X. 2X by 2X =4X, so 49X + 4X is 53X.

Yes it is. The thing that makes it a quadratic equation is that "x squared" in there.

63828

It is a quadratic equation.

x2 + x2 = 2x2 2x^2

2x2 + 2x - 8 = 2(x2 + x - 4). This can take any value greater than or equal to -8.5

2x2 + x2 = 3x2

Yes.

(2x-4)(x-1) = 0

(2x + 1)(2x + 1) or (2x + 1)2 so x = -0.5

X equals 2 :)

use the calculator

3x(2x + 1)

x = the square root of -2

3x2 + 2x - 8 = 0 is a quadratic equation.

This expression factors as x -1 quantity squared.

2 x cosine squared x -1 which also equals cos (2x)

-x2+2x

It equals to the equation of a straight line.

(-3, -5)

They intersect at the point of: (-3/2, 11/4)

it equals 13X.

As written, that's 4x squared = -21 and x equals the square root of -21/4. But if you meant that to be 12x, it factors out nicely to (2x + 3)(2x + 3) and x would equal -3/2

No, x + x equals 2x. x times x equals x2. (x times x equals x squared.)

2x2 + 2x = 2x(x+1)