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Y_Kistochka [10]
3 years ago
6

(a + b - c )(a + b + c )

Mathematics
2 answers:
ss7ja [257]3 years ago
8 0

Answer:

(a+b-c)(a+b+c)=a^2+2ab+b^2-c^2.

Step-by-step explanation:

We want to expand: (a+b-c)(a+b+c).

We use the distributive property to obtain:

(a+b-c)(a+b+c)=a(a+b+c)+b(a+b+c)-c(a+b+c).

We now expand to get:

(a+b-c)(a+b+c)=a^2+ab+ac+ab+b^2+bc-ac-bc-c^2.

This finally simplifies to

(a+b-c)(a+b+c)=a^2+2ab+b^2-c^2.

True [87]3 years ago
6 0

If you are looking for the expanded version, this is it. It is also possible to group either an a from (a^2 + 2b) or a b from (2ab + b^2). Hope this helps!

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What is the surface area?
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42 square yards

Step-by-step explanation:

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Need 19 plz don’t rlly understand but if u can help that would be amazing thanks <3
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Answer:

I got zero but I am not sure if that is right

Step-by-step explanation:

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3 years ago
A juggler tosses a bowling pin in the air with an initial velocity of 18 ft per second. It leaves his hand when it is five feet
Natali5045456 [20]

Complete Question

A juggler tosses a bowling pin in the air with an initial velocity of 18 ft per second. It leaves his hand when it is five feet from the ground and he catches it when it is four feet from the ground,How long is the ball in the air?

Answer:

t\approx 0.1s

Step-by-step explanation:

From the question we are told that

Initial velocity  V_0= 18 ft/s

Initial Height    h_1=5feet

Final Height     h_2=4feet

Generally the Newtons equation for motion is mathematically given by

   V^2 = U^2 + 2as

Where

    s=h_2-h_1\\s=4-5\\s=-1ft

And

   a=g=>9.81\\a=32.2ft/s^2

Therefore

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   V^2 = 388.4

   V =19.70786645\\V=19.71ft/s

Generally the equation for Time is mathematically Given as

   t=\frac{V-U}{a}

   t=\frac{19.71-18}{32.2}

   t=0.05310559006

   t\approx 0.1s

Therefore the time spent on air by the ball is

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Subtract the quotient of 18 and 3 from the sum of 22 and 9
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25 cuz 18/3=6 and 22+9=31. 31-6=25
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