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3 years ago

Is this trinomial factorable r^2-15r+56

Mathematics

1 answer:

ivolga24 [154]3 years ago

4 0

Answer:

(r - 8)(r - 7)

Step-by-step explanation:

Consider the factors of the constant term (56) which sum to give the coefficient of the r- term (- 15)

The factors are - 8 and - 7, hence

r² - 15r + 56 = (r - 8)(r - 7) ← in factored form

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erma4kov [3.2K]

Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers

The area of rectangle is ( 30x²y + 20xy ) cm² and its breadth is 10xy cm .Find its length.

emmasim [6.3K]

Step-by-step explanation:

1) The area of rectangle is ( 30x²y + 20xy ) cm² and its breadth is 10xy cm .Find its length....

= Solution ,

Length ( L ) = ?

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Now ,

area ( a ) = l × b

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$or,\frac{30 {xy + 20xy}^{2} }{10xy} = l \\$

$or, \: l = 3 {x}^{2 - 1} + 2cm$

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= Solution,

$= \frac{20 {x}^{4} {y}^{2} }{5 {x}^{3} y} \\$

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hope it helped !!!!

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