Answer:
-8√2
Step-by-step explanation:
Step 1: Rewrite the equation:
7√32-6√72
Step 2: Find a perfect square root that multiplies into √32 and √72:
7•√16•√2-6•√36•√2
Step 3: Solve the perfect square root:
7•4√2-6•6√2
Step 4: Multiply 7 and -6 to your answer :
28√2-36√2
Step 5 Combine like terms:
28√2-36√2
Step 6: Find your answer:
-8√2
