3 years ago

9p²-?p+49

Mathematics

1 answer:

Yanka [14]3 years ago

5 0

Answer: ? = 42

Step-by-step explanation:

(a-b)² = a² - 2ab + b². From 9p² -?p + 49 we see

9p² = (3p)² and 49 = 7² Then Middle term is -2·(3p)·7 = -42p

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3 years ago

Read 2 more answers

What is the length of the side labeled x cm?

UkoKoshka [18]

When we know 2 angles and one side, we use the Law of Sines.
First we need to find that third angle.
Angle A =
180 -41 -62 = 77 degrees

The Law of Sines states that

side a / Sine (A) = side x / Sine (X)
14 / Sine (77) = side x / Sine (41)

14 * Sine (41) / Sine (77) = side x

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 side x = 9.4264396482