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3 years ago

Factorise f²-f-20 step by step

Mathematics

2 answers:

dlinn [17]3 years ago

8 0

Answer:

(f+4)(f−5)

Step-by-step explanation:

The middle number is -1 and the last number is -20.

Factoring means we want something like

(f+_)(f+_)

We need two numbers that...

Add together to get -1

Multiply together to get -20

4+-5 = -1

4*-5 = -20

Fill in the blanks in

(f+_)(f+_)

with 4 and -5 to get...

(f+4)(f-5)

Naily [24]3 years ago

4 0

_______________________________

Hey!!

Solution,

f^2-f-20

= f^2-(5-4)f-20

= f^2-5f+4f-20

= f(f-5)+4(f-5)

=(f-5)(f+4)

So the answer is (f-5)(f+4)

Hope it helps..

Good luck on your assignment

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Given :-

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3 years ago

Factorise f²-f-20 step by step ​

Factorise f²-f-20 step by step