Find the value of expression 49a2 - 70ab + 25b2 when a = 2/7 and b= 1/5
Answers
Answered by
0
Step-by-step explanation:
We know 49a
2
+70ab+25b
2
=(7a)
2
+2(7a)(5b)+(5b)
2
We know that x
2
+2xy+y
2
=(x+y)
Here x=7a and y=5b
Therefore, 49a
2
+70ab+25b
2
=(7a)
2
+2(7a)(5b)+(5b)
2
=(7a+5b)
2
=(7a+5b)(7a+5b)
Answered by
0
Answer:
this can be contracted into (7a+5b)^2 or (2+1)^ or 9 which is our answer
Step-by-step explanation:
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