Multiply
(-1/4a+1/5b)(1/4a+1/5b)verify a=8,b=5
Answers
Answered by
30
Answer:
Multiply (-1/4a+1/5b)(1/4a+1/5b)verify a=8,b=5
(-1/4*8+1/5*5)(1/4*8+1/5*5)
=(-2+1)(2+1)
=-1*3
=-3
Answered by
39
Answer:
-1/16a2+1/25b2
Step-by-step explanation:
(-1/4a+1/5b) (1/4a+1/5b)
= 1/4a(1/4a+1/5b) + 1/5b(1/4a+1/5b)
= -1/16a2 - 1/20ab + 1/20ab + 1/25b2
= -1/16a2 + 1/25b2
If a=8 b=5
LHS
= (-1/4a+1/5b) (1/4a+1/5b)
= (-1/4×8+1/5×5) (1/4×8+1/5×5)
= (-2+1) (2+1)
= -2(2+1) + 1(2+1)
= -4-2+2+1
= -6+3
= -3
RHS
= -1/16a2 + 1/25b2
= -1/16×64 + 1/25×25
= -4+1
= -3
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