3 years ago

I need help solving x^2-2=7 by factoring

Mathematics

1 answer:

bonufazy [111]3 years ago

4 0

x^2-2=7

Subtract 7 from both sides

x^2-2-7=7-7

x^2-9=0

x^2-3^2=0

Using a^2-b^2=(a+b)(a-b)

Where a=x and b=3

(x-3)(x+3)

You might be interested in

At prestige university, the ratio of females to males is 3:1. if there are a total of 4811 students, how many are female?

Luden [163]

That'd be 3 / (3+1) times 4811 students, or 3608 students who are female.

The other fourth of the students are male.

5 0

3 years ago

The ratio of pounds of vegetables to pounds of protein on the dinner plate is 5 to 2. IF

leva [86]

Answer:

10 lbs

Step-by-step explanation:

25 is to 5 as x is to 2

25/5 = x/2

2 * 25/5 = x = 10 lbs

8 0

2 years ago

Consider the expression (-15) + 8. Describe a situation that could be represented by the expression. Then, find the sum and expl

Charra [1.4K]

Answer:

it not

Step-by-step explanation:

4 0

3 years ago

Which of the following facts would be sufficient to

Nady [450]

[email protected] = bainegoudy666 the answer is abbca

4 0

3 years ago

Which of the following formulas, when evaluated using rational values for the variables, will result in an irrational number?

Lerok [7]

Answer:

a) The formula for the area of a circle

Step-by-step explanation:

The formula for the area of a circle is

A = πr²

π is an irrational number and, no matter what value you use for r, the area will be an irrational number,

b) is wrong. A = ½(a + b)h.

c) is wrong. A = ½bh.

d) is wrong. A = bh.

All measurements are rational numbers, so the areas will be rational numbers.

8 0

3 years ago