7. Which expression is equivalent to (6x^2-4)+2(-2x^2+9) 2x^2+14 -2x^2+14 4x^2+5 -4x^2-5

To find the expression equivalent to $(6x^{2}-4)+2(-2x^{2}+9)$, we need to simplify the expression by combining like terms.<br /><br />First, distribute the 2 to both terms inside the parentheses:<br />$(6x^{2}-4)+2(-2x^{2}+9) = 6x^{2} - 4 - 4x^{2} + 18$<br /><br />Next, combine like terms:<br />$6x^{2} - 4x^{2} - 4 + 18 = 2x^{2} + 14$<br /><br />Therefore, the expression equivalent to $(6x^{2}-4)+2(-2x^{2}+9)$ is $2x^{2}+14$.