Step-by-step explanation:
3x+x=-7-5
4x=-12
x=-12/4
x=-3
Answer:
x = -2 ± sqrt(5)
Step-by-step explanation:
x^2 + 4x – 1= 0
Add 1 to each side
x^2 + 4x – 1+1= 0+1
x^2 +4x = 1
Take the coefficient of x
4
Divide by 2
4/2 =2
Square it
2^2=4
Add it to each side
x^2 +4x+4=1+4
(x+2)^2 = 5
Take the square root of each side
sqrt((x+2)^2 )=± sqrt(5)
x+2 = ± sqrt(5)
Subtract 2 from each side
x+2-2 = -2 ± sqrt(5)
x = -2 ± sqrt(5)
You do 53 can go into 66 1 time so put
92 can be rounded to 90
68 can be rounded to 70
90 x 70 = 6300
Answer:
-12x^2 + 11xy - 2y^2
Step-by-step explanation:
