<span>2x + x</span>²<span> + 3x + 5x</span>²<span> - 10x (combine like terms) 6x</span>² + 5x -10x 6x² - 5x which is the same as -5x +6x² Your answer is C
tangent is the ratio of opposite (o) to adjacent (a). it means when an angle is getting bigger, it will impact to the ratio of o/a and reaching infinite value at the angle 90°.