3 years ago

Which the following expressions is equivalent( a + b)(a-b)?

Mathematics

1 answer:

olga nikolaevna [1]3 years ago

8 0

Answer:

Step-by-step explanation:

(a+b)(a-b)=a^2-b^2

You might be interested in

Find the volume of a pyramid with a square base, where the area of the base is 19.8 cm2 and the height of the pyramid is 13.9cm.

PilotLPTM [1.2K]

Answer:

91.7 cm^3

Step-by-step explanation:

$Vol=\frac{1}{3} \times base area \times height=\frac{1}{3} \times 19.8 \times 13.9= 91.7 cm^{3}$

7 0

2 years ago

Need to find the ratio

wolverine [178]

Answer:

Step-by-step explanation:

CosA = AB/AC = 12/20 = 3/5

6 0

2 years ago

This entire page about functions has me stuck, I know the basics of functions and graphs but i'm still a little stumped, please

attashe74 [19]

Answer:

1. a 2.c

Step-by-step explanation:

7 0

3 years ago

Kazimir stopped jogging at 8:15. He started jogging 20 minutes earlier. At what time did Kazimir start jogging?

earnstyle [38]

7:55

That he answer

6 0

3 years ago

Read 2 more answers

2v^2-12 =-12v <br> Would really appreciate it loves❤️

Black_prince [1.1K]

For this case we have the following equation:

$2v ^ 2-12 = -12v$

Rewriting we have:

$2v ^ 2 + 12v-12 = 0$

Dividing by 2 to both sides of the equation:

$v ^ 2 + 6v-6 = 0$

We apply the quadratic formula:

$x = \frac {-b \pm \sqrt {b ^ 2-4 (a) (c)}} {2a}$

We have to:

$a = 1\\b = 6\\c = -6$

Substituting:

$x = \frac {-6 \pm \sqrt {6 ^ 2-4 (1) (- 6)}} {2 (1)}\\x = \frac {-6 \pm \sqrt {36 + 24}} {2}\\x = \frac {-6 \pm \sqrt {60}} {2}\\x = \frac {-6 \pm \sqrt {4 * 15}} {2}\\x = \frac {-6 \pm2 \sqrt {15}} {2}$

Thus, we have two roots:

$x_ {1} = - 3+ \sqrt {15}\\x_ {2} = - 3- \sqrt {15}$

ANswer:

$x_ {1} = - 3+ \sqrt {15}\\x_ {2} = - 3- \sqrt {15}$

7 0

2 years ago