Its like x² + 4x +20 = 0,
x = [-4 + √[(4²) - (4*1*20)]]/(2*1) = [-4 + √(16-80)]/2 = [-4 + √(-64)]/2 = [-4 + 8√(-1)]/2 = -2 + 4i,
x = [-4 - √[(4²) - (4*1*20)]]/(2*1) = [-4 - √(16-80)]/2 = [-4 - √(-64)]/2 = [-4 - 8√(-1)]/2 = -2 - 4i,
here i = √(-1), its a complex number.
so solution is a complex number,
x = -2 - 4i & -2 + 4i.
Answer: x= -11
Step-by-step explanation: Substitute y for -9, and move 2 to the other side, which would be -9-2=-11. So x=-11
Answer:
a ≤ 17
Step-by-step explanation:
25 ≥ 2a -9
To solve the equation above, we are going to follow the step below;
First, we will add 9 to both-side of the inequality
25 ≥ 2a -9
25 +9 ≥ 2a -9 + 9
34 ≥ 2a
To get the value of a, we will divide both-side of the inequality by 2
34/2 ≥ 2a/2
(On the right-hand side of the inequality, the 2 at the numerator will cancel-out the 2 at the denominator while on the left-hand side of the equation 34 will be divided by 2)
34/2 ≥ a
17 ≥ a
which implies: a ≤ 17
Answer:
i think this is the answer 289
Step-by-step explanation:
have a great day
Answer: x>6
Step-by-step explanation:
