3 years ago

Which will result in a perfect square trinomial (3x-5) (-3x-5)?

Mathematics

1 answer:

makvit [3.9K]3 years ago

8 0

Answer:

-9x² + 25

Step-by-step explanation:

To solve, use FOIL. FOIL:

First

Outside

Inside

Last

Solve "First":

(3x)(-3x) = -9x²

Solve "Outside":

(3x)(-5) = -15x

Solve "Inside":

(-5)(-3x) = +15x

Solve "Last":

(-5)(-5) = +25

Combine like terms:

-9x² - 15x + 15x + 25

-9x² (-15x + 15x) + 25

-9x² + 25

-9x² + 25 is your answer.

You might be interested in

-29 19/40 as a decimal

Mariulka [41]

19 divided by 40 is .475 so it’s -29.475

7 0

3 years ago

Naomi has earned $54 mowing lawns the past two days. she worked 2 1/2 hours yesterday and 4 1/4 hours today. if naomi is paid th

alukav5142 [94]

She earns about 7.71

7 0

3 years ago

If triangle ABC defined by the coordinates A(1,1), B(9,1), C(1,9) is dilated by a scale factor of 1/2

alukav5142 [94]

Answer:

The transformed points of the triangle ABC are $A' (x,y) = \left( \frac{1}{2}, \frac{1}{2}\right)$ , $B'(x,y) = \left(\frac{9}{2}, \frac{1}{2} \right)$ , $C'(x,y) = \left(\frac{1}{2}, \frac{9}{2}\right)$

Step-by-step explanation:

The new points after applying the scale factor are, respectively:

$A' (x,y) = \frac{1}{2}\cdot (1,1)$

$A' (x,y) = \left( \frac{1}{2}, \frac{1}{2}\right)$

$B' (x,y) = \frac{1}{2}\cdot (9,1)$

$B'(x,y) = \left(\frac{9}{2}, \frac{1}{2} \right)$

$C'(x,y) = \frac{1}{2}\cdot (1,9)$

$C'(x,y) = \left(\frac{1}{2}, \frac{9}{2}\right)$

7 0

3 years ago

(Reposted) Help Please I will give Brainliest if correct!!

Serhud [2]

Answer:

I think it is 1/25k if not im sorry

5 0

3 years ago

Read 2 more answers

The summit of Half Dome is the size of 17 football fields. A football field is 360 feet long and 160 feet wide. What is the area

puteri [66]

360*160=57600
57600*17=97920
I think its 97,920

4 0

3 years ago