Question

if x= -2,y= 7, find the value of the following

x3+2y-x2+xy+y2+4;

note- all 3 and 2 which is written at right side of x,x,y to show there square and cube

Answer 1

Answer:

(-2)³+2×7-(-2)²+(-2)(7)+(7)²+4

=-8+2×7-4-14+49+4

=-8+14-18+53

=67-26

41

Answer 2

Answer:

41

Step-by-step explanation:

x³ + 2y - x² + xy + y² + 4

Substituting values x and y we get :

= (-2)³ + 2×7 - (-2)² + (-2) × 7 + 7² + 4

= -8 + 14 - 4 - 14 + 49 + 4

= 59 - 18

= 41

HOPE THIS HELPS......