1.6x(squared) + x(squared) = 21.6?

Question

What is the value of x

I don't know how to make the exponent so I just wrote squared

Answer 1

1.6x² + x² = 21.6

factor out the common x² :

x²(1.6 + 1) = 21.6
2.6x² = 21.6

Divide both sides by 2.6 to isolate the x² variable

x² = 21.6 ÷ 2.6

Take square root of both sides to get x:

x = √(21.6 ÷ 2.6)
x ≈ ± 2.88
Answer with more decimal places: 2.88230677

Answer 2

First add the two values for x squared together. Any time that you have a number in front of the same variable, in this case x^2, you can add them together.

So you get:

2.6x^2 = 21.6

Now divide by the 2.6 so you have x by itself:

x^2 = 21.6 / 2.6 or x ^2 = 8.308

Now take the square root of both sides and you get:

x = sqrt(8.308) or x = 2.882

Answer 3

1.6x(squared) + x(squared) = 21.6
1.6 x^2 + x ^2 = 21.6
2.6 X^2 = 21.6
X^2 = 21.6/2.6
X = square root of 8.30769231 = 2.88230677

Answer 4

1.6x^2 + x^2 = 2.6 x^2 = 21.6
x^2 = 21.6/2.6 = 8.307692308
x = +/- 2.882306768

Answer 5

1.6x^2 + x^2 = 21.6

2.6x^2 = 21.6

x^2 = 21.6 / 2.6

x^2 = 8.31

x = square root of 8.31

x = 2.88

Answer 6

1.6x^2 + x^2 = 21.6

2.6 x^2 = 21.6

x^2 = 21.6/2.6

x = +- sqrt(21.6/2.6)

Answer 7

1.6x^2 + x^2 = 21.6

2.6x^2 = 21.6

x^2 = (21.6/2.6)

x = sqrt (21.6/2.6)

x = 2.882306

Answer 8

2.6 x^2 = 21.6

x^2 = 8.307

x = 2.88

Answer 9

add the coefficients 1.6 + 1= 2.6

Then bring together like terms

two x2 = x2

answer 2.6x2

Answer 10

6x^2+x^2=21.6
7x^2=21.6
x^2=3.0
x=+/- 1.732 answer