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Inessa05 [86]
3 years ago
11

Express (a+b) ^2 -4 by factorization

Mathematics
1 answer:
NemiM [27]3 years ago
5 0

Step-by-step explanation:

= (a + b) {}^{2}  - 2 { }^{2}  \\ = ( a + b  + 2)(a + b - 2)

in 2nd exp. this is because by using the formula of a2-b2

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Can I get help on this question? Please explain the process of how to solve it too.
gizmo_the_mogwai [7]

Answer:

x = 13

y = 18.38

Step-by-step explanation:

tan 45 = x/13       (tangent = opposite / adjacent)

1 = x/13

multiply both sides by 13

x = 13

cos 45 = 13/y       (cosine = adjacent / hypotenuse

0.7071 = 13/y

multiply both side by y

0.7071y = 13

divide both side by 0.7071

y = 18.38

5 0
3 years ago
Convert 150 degrees to radian
Dafna1 [17]

Answer:

A

Step-by-step explanation:

To convert degrees to radians

radian measure = degree measure × \frac{\pi }{180}

Hence

radian measure = 150° × \frac{\pi }{180}

Cancel both 150 and 180 by 30, then

radian measure = 5 × \frac{\pi }{6} = \frac{5\pi }{6}

8 0
3 years ago
Find angle A using sin-1
ki77a [65]

Answer:

75°

Step-by-step explanation:

firstly, use the pythagoras theorem

Square root(8²-2²) = 7.75

Then, use sine

sine A= 7.75/8

Sine A=0.9688

A= (sine power of -1) x (0.9688)

A=75.63

5 0
3 years ago
Please help. quickly if possible
Dafna11 [192]

Answer:

B

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
How many different meal combinations are possible if he chooses one type of sandwhich, one snack, and one drink ?
svet-max [94.6K]

Answer:

12 different possibility

Step-by-step explanation:

1- pbj, cookie, juice

2-pbj, cookie, milk

3-pbj, cookie water

4-pbj,brownie, juice

5-pbj, brownie milk

6-pbj, brownie water

7-turkey, cookie, juice

8-turkey, cookie, milk

9-turkey, cookie, water

10-turkey, brownie, juice

11-turkey, brownie, milk

12-turkey, brownie, water

4 0
4 years ago
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