Question

Is this correct? if not please show correct version step by step.

Answer 1

Step/Answer:

The mistake begins at the line 3 where distrubting 2 in the expression. line 1 and line 2 both are correct. But line 3 is wrong.

`2 {x}^(2) + 2x - 2 = 2 {x}^(2) - 18 \\ 2 {x}^(2) + 2x - 2 - 2 {x}^(2) + 18 = 0 \\ 2x - 2 + 18 = 0 \\ 2x + 16 = 0 \\ 2x = - 16 \\ x = - 8`

`2( {x}^(2) - 9) = (2 * {x}^(2) ) + (2 * ( - 9)`

From line 3, you forgot to distribute 2 in -9.