Answer:
-2.61803398875, -0.38196601125
or
(-3±√5)/2
Step-by-step explanation:
First, expand. (2x+3)² = 4x²+12x+9=5
4x²+12x+4 = 0
Quadratic equations take the form ax²+bx+c = 0
In this case,
a = 4
b = 12
c = 4
You can solve with the equation x=(-b±√b²-4ac)/2a
Plug in:
(-12±√144-64)/8
(-12±√80)/8
(-12±√2^4×5)/8
(-12±4√5)/8
(-3±√5)/2
Final answer x = (-3±√5)/2
If you want decimal form: -2.61803398875, -0.38196601125
Since the square has 4 sides, you only have to add
four times.
The <span>perimeter of the square is: </span><span>
cm </span>
The answer is b = 3. you subtract 24 from bothe sides and then divide by 2.
Let the numbers be m and n. Then "<span>five times the quotient of two numbers" would be 5m/n.
</span>
10 divided by 5 equals 2
9 divided by 3 equals 3
