3 years ago

What is the factor form of 2x^2-25=0 and -4x^2+81=0

1 answer:

8 0

$2x^2-25=0\\\\(x\sqrt2)^2=5^2=0\\\\(x\sqrt2-5)(x\sqrt2+5)=0\\-------------------------\\-4x^2+81=0\\\\81-4x^2=0\\\\9^2-(2x)^2=0\\\\(9-2x)(9+2x)=0\\------------------------\\Used:\\(a-b)(a+b)=a^2-b^2$

You might be interested in

Which number like inequality represents n<-1?

Alenkinab [10]

The second one is your answer

7 0

3 years ago

Enjoy!!! (Fun work I know)

leva [86]

Answer:

14% were running backs 43/50 were not running backs

Step-by-step explanation:

0.14=14%

--------------

1-0.14=0.86

50x0.86=43

5 0

3 years ago

Read 2 more answers

A Stained Glass window it is pictured below the curve lines are semi circles and ABCD is a square with sides 8 feet what is the

pishuonlain [190]

If the square is the window (I couldn't decipher the grammar/punctuation), the area is 64 feet squared. Since it is a square, the formula to find the area is sxs (side length times side length). 8x8=64, which makes the total area 64 square feet.

6 0

3 years ago

Find the measure of each side indicated. Round to the nearest tenth. Picture included below.

skad [1K]

Step-by-step explanation:

Use the sine and cosine trig functions

21) cos(52)=13/x

x=13/cos(52)

x=21.1

22) sin(75)=6/x

x=6/sin(75)

x=6.2

4 0

3 years ago

The first three terms of a sequence are -9 -7 -5

Crank

Answer:

-3

Step-by-step explanation:

7 0

3 years ago