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3 years ago

9x^2-25 Yea, it confused me too I need this explained to me pls and thank you.

Mathematics

1 answer:

Veseljchak [2.6K]3 years ago

4 0

Answer:

What this is is factoring and these are both perfect squares.

(3x-5)(3x+5) is the answer.

Step-by-step explanation:

First we take the 9x^2-25 and split in in two statements

(3x-5) (3x+5)

then foil to check it

first side: 3x*3x=9x^2

outside: 3x*5=15x

inside: -5*3x=-15x

last: -5*5=-25

then put it together

9x^2+15x-15x-25

the 15x and -15x cancel each other out so you're left with 9x^2-25

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What property would justify the following statement? If a = b and b = c, then a = c. Addition Property Reflexive Property Subtra

romanna [79]

Answer:

It would be the transitive property! If you look up "If a = b, and b = c, then a = c" you'd see the transitive property. I hope this helps!

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3 years ago

How to classify 8x4 + 7x3 + 5x2 + 8 by number of terms.

Arisa [49]

Answer:

This is a polynomial.

Step-by-step explanation:

A monomial is a constant, a variable or the product of constants and variables.

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3 years ago

Read 2 more answers

X² - 2x=0<br> what is this...like what’s the outcome

Tanzania [10]

Answer:

x=0 x=2

Step-by-step explanation:

X² - 2x=0

Factor

x(x-2) = 0

Using the zero product property

x=0 x-2 =0

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4 0

3 years ago

√−100 = ___ +_____i<br> ...

Natalija [7]

Answer:

Step-by-step explanation:

Rewrite this as

$\sqrt{(-1)(100)}$

Knowing that i-squared = -1:

$\sqrt{(i^2)(100)}$

Both i-squared and 100 are perfect squares, so this simplifies to

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7 0

3 years ago

Help please! Do not answer if you are not going to help me

kirza4 [7]

9514 1404 393

Answer:

12. (x, D, E, F) = (8, 38°, 75°, 67°)

13. (x, P, Q, R) = (13, 126°, 30°, 24°)

Step-by-step explanation:

The sum of angles in a triangle is 180°. We choose to write the equations assuming all measures are degrees.

12. (5x -2) +(9x +3) +(11x -21) = 180

25x = 200 . . . . . . . add 20, simplify

x = 8 . . . . . . . . . divide by 25

Then the angle measures are ...

∠D = 5(8) -2 = 38°

∠E = 9(8) +3 = 75°

∠F = 11(8) -21 = 67°

13. (10x -4) +(4x -22) +(x +11) = 180

15x = 195 . . . . . . . . . . add 15, simplify

x = 13 . . . . . . . . . divide by 15

Then the angle measures are ...

∠P = 10(13) -4 = 126°

∠Q = 4(13) -22 = 30°

∠R = 13 +11 = 24°

4 0

3 years ago

9x^2-25 Yea, it confused me too I need this explained to me pls and thank you.​

9x^2-25 Yea, it confused me too I need this explained to me pls and thank you.