Question

the value of algebraic expression for3x^2-y^3x=y and y=2

Answer 1

Given,

3x−2y=5−−−−−−(1) and xy=4−−−−−(2)

squaring (1),

9x

2

+4y

2

−12xy=25

using (2),

9x

2

+4y

2

=25+12×4

=>73