FACTORISE:
x^2-5x-2
pls send
Share
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Step-by-step explanation:
This question can't be factorised so you have to use quadratic formula here..
Quadratic Formula : -b +or- √b²-4ac
-------------------------
2a
= -(-5) +or- √(-5)²-4(1)(-2)
---------------------------------
2(1)
= 5 +or- √25-8
----------------------
2
= 5+√17 5-√17
--------- and ----------
2 2
Verified answer
Answer:
Question :-
Factorise :-
x^2 - 5x - 2 = 0
Required Answer :-
x^2 - 5x - 2 = 0
comparing with ax^2 + bx + c = 0,
a = 1,b = - 5, c = - 2
b^2 - 4ac = (-5)^2 - 4(1)(-2)
= 25 + 8
= 33
[tex] x \: = \frac{ - \: b \: \: + - \: \sqrt{b {}^{2} \: - \: \: 4ac } }{2a} [/tex]
[tex]x \: = \: \frac{ \: - ( - 5) \: + - \: \sqrt{33} }{2(1)}[/tex]
[tex]x \: = \: \frac {5 + - \sqrt{} 33}{2}[/tex]
hope it help you
[tex]x \: = \frac{5 \: + \sqrt{} 33} {2} \: or \: x \: = \frac{5 - \sqrt{} 33}{2} \\ \\ [/tex]