Answer:
Step-by-step explanation:
-2
4
-7
-5 + -2 = is the same as -5 - (+2), so the answer is -7
Make it shorter so i can help you
(X-6) √x^2+2x-15 \ x^2 +2x - 15
x² - y² = 135
<=> (x - y)(x + y) = 135
<=> 15(x + y) = 135
=> x + y = 135/15 = 9
=> (x + y)² = 81
