2 years ago

Solve x2 + 6x = 7 by completing the square. Which is the solution set of the equation?

Mathematics

1 answer:

satela [25.4K]2 years ago

7 0

The answer is x=1 and x=-7
x^2+6x=7
x^2+6x-7=0
(x+7)(x-1)
x=-7 x=1

You might be interested in

Simplify the expression.<br><br> (−2g5h2)5

vampirchik [111]

I am sure you are trying to type

$( - 2 {g}^{5} {h}^{2} {)}^{5}$
If that is it, then you should recall the law of exponents which says,

$({a}^{m} {)}^{n} = {a}^{mn}$
Let us share the exponent for each of them.

$( - 2 {g}^{5} {h}^{2} {)}^{5} = ( { - 2)}^{5} ( { {g}^{5}) }^{5} ( { {h}^{2}) }^{5}$
We now apply the law,

$( - 2 {g}^{5} {h}^{2} {)}^{5} = ( { - 2)}^{5} ( { {g}^{5 \: \times 5}) }^{} ( { {h}^{2 \times 5}) }^{}$
We now simplify to obtain,

$( - 2 {g}^{5} {h}^{2} {)}^{5} = -32 {g}^{25} {h}^{10}$

If that is not the expression let me know so I will know how to help you

4 0

2 years ago

Plz help me with the problem 13 − 12y = 13

barxatty [35]

Bring the 13 over to read 13-12y-13=0 then move the 12y over do it becomes 13-13=12y 0=12y y=0

5 0

2 years ago

three notebooks and 4 binders are $9.00. two notebooks and 4 binders cost $8.00. how much does a binder cost?

Goryan [66]

$1.50 (please mark brainliest)

4 0

2 years ago

Need help with question a

SVEN [57.7K]

Answer:

1.8 cm

6.3 cm²

Step-by-step explanation:

AC⊥BC

BD=BC=x

(x+5)²+x²=7²
x²+10x+25+x²=49
2x²+10x- 24=0
x²+5x-12=0
x=1.8

BC= 1.8 cm

Area of ABC= 1/2*1.8*7= 6.3 cm²

4 0

3 years ago

The height of a tree was 8 feet. After a year the trees height increased by 25% draw a diagram to find the new height of the tre

Over [174]

Wait you can draw on here?

8 0

2 years ago