Let's see if we can get to √(8-a)(5+a) from the following equation:
√(8-a) + √(5+a) = 5
Start by squaring both sides (whatever operation you do to one side of an equation you must do to the other side as well):
[√(8-a) + √(5+a)]^2 = 5^2
8 - a + 2√(8-a)(5+a) + 5 + a = 25
2√(8-a)(5+a) = 12
Divide both sides by 2:
√(8-a)(5+a) = 6 --->your answer
I hope this will help.
If √8-a + √5+a = 5, then √(8-a)(5+a) = ...
Please help me solve this.
2 answers
Helped alot! Thank you!