8. Evaluate, if a = 2, b = 1 and c= 10. The question is ( - a - b + c)²
Answers
Answered by
2
Answer:
Formula,
(a+b+c)
2
=a
2
+b
2
+c
2
+2ab+2bc+2ca
⇒(a+b+c)
2
=a
2
+b
2
+c
2
+2(ab+bc+ca)
Given,
ab+bc+ca=10,a
2
+b
2
+c
2
=16
⇒(a+b+c)
2
=16+2(10)
a+b+c=
16+20
=6
Answered by
1
Answer:
121
(c + b) ^ 2 = c ^ 2 + b ^ 2 + 2cb
100+1+2×10×1
100+1+20
120+1
121
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