Ask question

Ask question

All categories

3 years ago

8

Solve the following quadratic equation by the square root property of equality. x2 - 81 = 0

1 answer:

Sunny_sXe [5.5K]3 years ago

5 0

To solve for the square root property of equality of the quadratic equation, both sides of the equation must be square root. To do that we transfer the other term to the other side making it, x2 = 81. Now we can take the square root of both sides, √x2 = √81, x = 9 or x = -9.

You might be interested in

Is (3,2) a solution of the system of equations?Explain<br> 2x+y=8<br> -x+3y=4

lesya692 [45]

Answer:

no

Step-by-step explanation:

2(3)+2=8

6+2=8

-x+3y=4

-(3)+3(2)=4

-3+6=4

3 does not equal 4

7 0

3 years ago

Can someone solve 3(b+2)+2(b-3)=-5

Alenkinab [10]

Answer:

b=-1

Step-by-step explanation:

3(b+2)+2(b-3)=-5

3b+6+2b-6=-5

5b=-5

b=-1

5 0

3 years ago

Read 2 more answers

Let f(x)=11-3xm compute f(2)+f^-1(2)

Ganezh [65]

Taking f(X) to be y
Y = 11 - 3X
3X = 11 - y
X = (11-y)÷3
F^-1(x) = (11 - x)÷3 addING both equations
It gives = 0

Please mark as brainliest

8 0

3 years ago

Latasha reads 9 pages in 3 minutes. Latasha reads at a rate of

pav-90 [236]

Answer:

3 pages per minute.

Step-by-step explanation:

If we know that she reads 9 pages in 3 minutes, then we can divide the whole speed by 3 to get how much she reads in one minute.
3 pages in 1 minute.

3 0

2 years ago

Read 2 more answers

Please solve quickly!

mafiozo [28]

Answer:

F(-2)=20

Step-by-step explanation:

given F(x)=-2x^3+4

F(-2)= ${(-2)\times(-2)^3}$ +3

put -2 in place of x

F(-2)= $(-2)\times(-8)$ +4

=16+4=20

F(-2)=20 answer

6 0

3 years ago