Question

17 Smplify:7 - {6 - 12 = (5 + 9x2 -19)}​

Answer 1

Step-by-step explanation:

7-{6-12=5+9x^2-19}

13=21-9x^2

9x^2+8=0

factor(9x^2-8)

(-2 root(2))/3 and (2 root(2))/3