2 answers:
Answer:
Step-by-step explanation:
It is really easy once you understand the concept.
Let's start with an easy example.
x^2+6x=-2
Add 9 on both sides to get a perfect square
x^2+6x+9=7
Then factor on the left
(x+3)^2=7
Then get the square root
x+3=+7 x+3=-7
x=4 x=-10
Another example.
x^2+12x+32=0
Subtract 32 from both sides
x^2+12x=-32
Add 36 on both sides to get a perfect square
x^2+12x+36=4
Factor
(x+6)^2=4
Get the square root
x+6=2 x+6=-2
x=-4 x=-8
(Go to khan academy, they are good at explaining things)
Answer: Step 1. Divide all terms by a (the coefficient of x2).
Step 2. Move the number term (c/a) to the right side of the equation.
Step 3. Complete the square on the left side of the equation and balance this by adding the same value to the right side of the equation.
Step-by-step explanation:
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Answer:
Step-by-step explanation:
$5.71
good luck and pls mark brainliest if correct
(x-3)^2 + (x+5)^2=9^2
(x^2-6x+9) + (x^2+10x+25)=81
2x^2+4x+34=81
2x^2+4x-47=0
From here just use quadratic formula
Answer:
7.7 ft
Step-by-step explanation:
The third longest side is also the second shortest side.
The 14 ft side of quadrilateral ABCD corresponds to the 6 ft side of quadrilateral EFGH.
14/6 = 18/x
7/3 = 18/x
7x = 18 * 3
7x = 54
x = 54/7
x = 7.7
Answer: D. 7.7 feet
Answer:
the dog was born on july 30th so the dog would be 3 months and a week old
Step-by-step explanation:
