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Furkat [3]
3 years ago
9

Is there a way to solve (2x - 5)^2 using the formula a^2 - b^2 = (a-b) (a+b)?​

Mathematics
1 answer:
Nuetrik [128]3 years ago
5 0

Answer:

yes

soln

(2x)² - (5)²

= (2x - 5)(2x + 5)

4x² + 10x - 10x - 25

4x² - 25

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HELP PLEASE ITS DUE TOMMOROW AND I HAVE 2 TESTS TO TAKE TODAY D:
Mashcka [7]

Answer:

x=25

x=47

y=25 x=10

y=20

Step-by-step explanation:

2x+10=60

-10 -10

2x=50

2x/2=50/2

x=25

2x+6=100

-6 -6

2x=94

2x/2=94/2

x=47

5y-25=100

+25 +25

5y=125

5y/5=125/5

y=25

11x-30+100=180

11x+70=180

-70 -70

11x=110

11x/11=110/11

x=10

7y-10=3y+70

+10 +10

7y=3y+80

-3y-3y

4y=80

4y/4=80/4

y=20

hopefully this helps :)

8 0
3 years ago
What is 503 rounded to the nearest hundred
yawa3891 [41]
500 is the answer because 500 is much closer
3 0
3 years ago
Find the height of a triangle with an area (A) of 35 square inches and base of 7 use the formula A= 1/2bh
slega [8]

Answer:

D. 10

Step-by-step explanation:

Since you divided by 2. You want to multiply to go back wards.

35×2=70

They already give you base(b=7) so to find the height you need to divide to go backwards since you multipled bh.

70÷7=10

now plug it in to see if the equation is right.

35= 1÷2 (7×10)

5 0
3 years ago
ASAP WILL MARK BRAINLYEST <br><br><br>answer these two please!
Trava [24]

19.\\y=3x^2\\a=3,\ b=0,\ c=0\\\\\dfrac{-b}{2a}=\dfrac{-0}{2(3)=0\to x=0\\\\3x^2=0\ \ \ \ |:3\\\\x^2=0\to x=0

20.\\y=x^2-x-2\\a=1,\ b=-1,\ c=-2\\\\\dfrac{-b}{2a}=\dfrac{-(-1)}{2(1)}=\dfrac{1}{2}\to x=\dfrac{1}{2}\\\\x^2-x-2=0\\\\x^2-2x+x-2=0\\\\x(x-2)+1(x-2)=0\\\\(x-2)(x+1)=0\iff x-2=0\ \vee\ x+1=0\\\\x=2\ \vee\ x=-1

3 0
3 years ago
Need help with number 9 please, thanks.
timurjin [86]
Its point P because the lines between 1 and 2 are 1/4 2/4 and 3/4 and its looking for 1 1/4 so the correct is the line after number 1 on the x axis and the y axis is 2 which you can see p is located it
3 0
4 years ago
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