Evaluate -4x + 4y + 3 when x = -5 and y = -1.
Note
Substitute the given values carefully: -4(-5) + 4(-1) + 3 = 20 - 4 + 3 = 19. A common mistake is to ignore the sign of y or the sign of the coefficient.
Evaluate -4x + 4y + 3 when x = -5 and y = -1.
Substitute the given values carefully: -4(-5) + 4(-1) + 3 = 20 - 4 + 3 = 19. A common mistake is to ignore the sign of y or the sign of the coefficient.