3 years ago

Find two different 2 by 2 matrices a and b such that ab=ba

Mathematics

1 answer:

stiv31 [10]3 years ago

8 0

Let $\mathbf A=\mathbf I$ be the identity matrix. Then pick whatever matrix you like for $\mathbf B$ .

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3 years ago

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yaroslaw [1]

Answer:

66 cm

Step-by-step explanation:

Diameter (d) = 21 cm

$C = \pi \: d = \frac{22}{7} \times 21 = 22 \times 3 = 66 \: cm$

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Figure A is a scale image of Figure B. What is the value of x?

Arte-miy333 [17]

X=30
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3 years ago

Use foil (a + 3)(a - 2)

blsea [12.9K]

Answer:

$\left(a+3\right)\left(a-2\right)=a^2+a-6=$

Step-by-step explanation:

Given expression is $\left(a+3\right)\left(a-2\right)$ .

Now we need to multiply this using FOIL.

F = First $=\left(a\right)\left(a\right)= a^2$

O = Outside $=\left(a\right)\left(-2\right)= -2a$

I = Inside $=\left(3\right)\left(a\right)= 3a$

L = Last $=\left(3\right)\left(-2\right)= -6$

Hence we get :

$\left(a+3\right)\left(a-2\right)=a^2-2a+3a-6=a^2+a-6=$

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3 years ago

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