Question

Write the expression 5x² - 4 - 3 x ²
+ 6x + 8 + 5x-13 in its simplified
form find its value When x= -2​

Answer 1

Answer:

5x² - 4 - 3x² + 6x + 8 + 5x - 13 = 5(-2)² - 3(-2)² + 6(-2) + 5(2) - 4 + 8 - 13

= 5(4) - 3(4) - 12 + 10 - 4 + 8 - 13

= 20 - 12 - 12 + 10 - 4 + 8 -13

= 8 - 2 + 4 - 13

= 6 - 9

= - 3