Simplify the expression 4a2-b2+6a2-7b2 and find its value if x=2 , a=-1,
b=-3
Answers
Answered by
1
3a is the answer
Step-by-step explanation:
very easy
Answered by
2
Answer:
9
Step-by-step explanation:
4a2-b2+6a2-7b2 =4(-1)-(-3)2+6(-1)-7(-3) =-4-6+-6-21 =4-6+6-21 =9
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