The zeroes of a polynomial 3x 2 -2x-5 are ______________
Answers
Answered by
43
Given :-
⇒ f(x) = 3x² - 2x - 5
To Find :-
⇒ Zeroes of the polynomial
Solution :-
★ By splitting Middle term ★
⇒ 3x² - 2x - 5 = 0
⇒ 3x² - 5x + 3x - 5 = 0
⇒ x ( 3x - 5 ) + 1 ( 3x - 5 ) = 0
⇒ ( x + 1 ) ( 3x - 5 ) = 0
When x + 1 = 0
⇒ x = - 1
When 3x - 5 = 0
⇒ 3x = 5
⇒ x = 5/3
Answered by
11
Given :
- 3x² - 2x - 5
to find :
- The zeroes of a polynomial
solution :
3x² - 2x - 5 = 0
3x² - 5x + 3x - 5 = 0
x(3x - 5) + (3x - 5) = 0
x(3x - 5) + 1(3x - 5) = 0
(x + 1) (3x - 5) = 0
x + 1 = 0
x = - 1
3x - 5 = 0
3x = 5
x = 5/3
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