Answer:
9/20
Step-by-step explanation:
The solution is a=4
-2(1+5a)=-6(a+3)
-2-10a=-6a-18
+18 +18
16-10a=-6a
+10a +10a
16=4a
divide by 4
4=a
The difference of squares is (a - b)(a + b) = a² - b². Since a = x and b = 2, the answer is x² - 4.
