2x+3y=4 and xy=1 then find 4x^2+9y^2=?
Answers
Answered by
0
Answer:
please comment me my answer
Step-by-step explanation:
2x+3y=8 and xy=2,
formula,
(a+b)
2
=a
2
+b
2
+2ab
∴(2x+3y)
2
=4x
2
+9y
2
+2(2x)(3y)
(2x+3y)
2
=4x
2
+9y
2
+12xy
8
2
=4x
2
+9y
2
+12(2)
∴4x
2
+9y
2
=64−24=40
Similar questions