Question

Evaluate 3x²-2y³ when x = 2 and y = -1

Answer 1

Ans

3x^2-2y^3,

but x=2and y=-1

3(2)^2-2(-1)^3=3×4-2×(-1)=12+2=14

Answer 2

If x = 2 and y = - 1, then $3x^2-2y^3$ = 14

Step-by-step explanation:

We have,

$3x^2-2y^3$ , x = 2 and y = -1

To find, $3x^2-2y^3$ = ?

∴ $3x^2-2y^3$

Put x = 2 and y = - 1, we get

$3(2)^2-2(-1)^3$

$=3(4)-2(-1)$

$=12+2$

= 14

∴ If x = 2 and y = - 1, then $3x^2-2y^3$ = 14

Hence, if x = 2 and y = - 1, then $3x^2-2y^3$ = 14