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expeople1 [14]
3 years ago
12

Factor 4a^2-25. Please

Mathematics
1 answer:
Dmitrij [34]3 years ago
8 0

Answer:

(2 a - 5) (2 a + 5)

Step-by-step explanation:

Factor the following:

4 a^2 - 25

4 a^2 - 25 = (2 a)^2 - 5^2:

(2 a)^2 - 5^2

Factor the difference of two squares. (2 a)^2 - 5^2 = (2 a - 5) (2 a + 5):

Answer: (2 a - 5) (2 a + 5)

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A board 1.2 m long is cut into two so that the length of the longer piece is 15cm longer than twice the length of the shortest p
MAXImum [283]

Answer:

The length of the shorter piece=0.35 m

Step-by-step explanation:

Let the lengths be as follow;

Shorter piece=x

Longer piece=15 cm longer than twice shorter piece(x)

Since 1 m=100 cm, 15 cm=15/100=0.15 m

Longer piece= (2×x)+0.15=2x+0.15

Total length=1.2 m

Total length=shorter piece+longer piece

Replacing;

1.2=x+2x+0.15

3x=1.2-0.15

3x=1.05

x=(1.05/3)=0.35

The length of the shorter piece=x=0.35

4 0
3 years ago
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SashulF [63]

Answer:

55

Step-by-step explanation:

9x + 1 = 7x + 13

x = 6

UW = 42+13

= 55

The two triangles are of congruent (SAS)

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MrMuchimi
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Leokris [45]

Answer:

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Step-by-step explanation:

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