Answer:
-1
Step-by-step explanation:
4x=-4
X = - 1
That's itt
Answer:
34
Step-by-step explanation:
-1, 0, 1, 2, 3, 4. because it's every number greater than -2 and less than 5
First you calculate the determinant:
d=b^2-4ac
d=4^2-4*1*(-21)=16+84=100
Because d>0 there are two solutions for x:
x_1 = (-b+√d)/2a = (-4+√100)/2*1 = 6/2 = 3
x_2 = (-b-√d)/2a = (-4-√100)/2*1 = -14/2 =-7
The solutions for x is x = 3 and x = -7
