Question

a 4 ( 6x-6) + 6 x = x +11+ 4x - 28
b-5 (- 4x + 3) - 3x2 = 12 - 2x?​

Answer 1

a) 4 (6x-6)+6x=x+11+4x-28

24x-24+6x=x+11+4x-28

24x+6x-x-3x=11-28+24

26x=7

x=7/26

$b)5( - 4x + 3) - 3 {x}^{2} = 12 - 2x \\ - 20x + 15 - 3 {x}^{2} = 12 - 2x \\ - 20 + 2x - 3 {x}^{2} + 15 - 12 \\ - 3 {x}^{2} - 18x + 3 \\ - 3 {x}^{2} - 18x+ 3 = 0 \\ \\ {18x}^{2} - 4.( - 3).3 \\ 324 + 36 = 360$