Question

Please tell me right answer for the following question.
Factorise 15x^2-21x+10​

Answer 1

Answer:

15x² - 21 x+ 10

3(5x² - 7x + 10)

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Answer 2

Step-by-step explanation:

Given quadratic polynomial is 15x²-21x+10

It can be written as a=15;b=-21;c=10

by formula method

x=[-b±√(b²-4ac)]/2a

=>x=[21±√(21²-4×15×10)]/(2×15)

=>x=[21±√(441-600)]/30

=>x=(21±√-159]/30

so,

15x²-21x+10=(x-[21-√-159)/30])(x-[21+√-159]/30)