If a2 + b2 = 13 and ab = 6, find (i) a + b (1) U
If a + b = 4 and ab = -12, find (i) a - b (ii) a2 - b2.
Answers
Answered by
1
Given,
a + b = 5 and a
2
+b
2
=13
On squaring a + b = 5 both sides, we get
(a+b)
2
=(5)
2
a
2
+b
2
+2ab=25
13+2ab=25⇒2ab=25−13=12
⇒ab=12/2=6
∴ab=6
please marks me Brainlyst
Similar questions