Answer:
x = -2i and x = 2i
x = 3 and x = - 3
Step-by-step explanation:
x^4 - 5x^2 - 36 = 0
let u = x^2 and substitute
we have:
u^2 - 5u - 36 = 0
(u - 9)(u + 4) = 0
u = 9 and u = - 4
substitute back for u
x^2 = 9
x = 3 and x = - 3
x^2 = -4 -- i am going to assume you've learned imaginary numbers; otherwise, you cannot take the square root of a negative number.
x = -2i and x = 2i
Answer:
(3, 4 )
Step-by-step explanation:
3x - y = 5 → (1)
x + y = 7 → (2)
adding the 2 equations term by term will eliminate y
4x + 0 = 12
4x = 12 ( divide both sides by 4 )
x = 3
substitute x = 3 into either of the 2 equations and solve for y
substituting into (2)
3 + y = 7 ( subtract 3 from both sides )
y = 4
solution is (3, 4 )
Answer:
x= 127/2
Step-by-step explanation:
Let's solve your equation step-by-step.
(x−3)(2)+4=125
Step 1: Simplify both sides of the equation.
(x−3)(2)+4=125
(x)(2)+(−3)(2)+4=125(Distribute)
2x+−6+4=125
(2x)+(−6+4)=125(Combine Like Terms)
2x+−2=125
2x−2=125
Step 2: Add 2 to both sides.
2x−2+2=125+2
2x=127
Step 3: Divide both sides by 2.
2x/2 = 127/2
x=127/2
Please mark brainliest :)
Answer:
On the side
Step-by-step explanation:
It will most likely land on the side, because that has the biggest outcome frequency
Answer:
6 it's the same as the one next to a and b that's also 6
