The value of - x2 + 3 at x = -1 is
1
4
2
C.
2
The product of ( x + a) and (x - b) is
x2 + (a - b)x - ab
x2 - (a - b)x - ab
x2 + (a - b)x + ab
Add: 9xy - 3yz + 2zx; 2xz + 9xy - 4y and -2xz + 5x + 3xy.
The value of x2 - 3 at x = -1 is
-2
-1
The product of (a + b) and (a + b ) is
a2 + 2ab - b2
a2 - 2ab + b2
a2 + 2ab + b2