Question

If alpha and beta are zeroes of the polynomial x2

-5x+6, then value of α + β -3 αβ is

(a)15 (b)-13 (c)13 (d)-15
​

Answer 1

Answer:

alpha + beta = -b/a

                    =-(-5)/1

                    = 5

alpha x beta = c/a

                     = 6/1

                     =6

therefore, 5-3(6)

                 5-18

                 =-13

hope its right

please mark this as the brainliest answer

Answer 2

$the \: sum \: of \: zeroes \: of \: polynomial \\ = \alpha + \beta = - b \div a \\ = - ( - 5) \div 1 \\ = 5 \\ and \: product \: of \: zeroes = \alpha \beta = c \div a \\ = 6 \\ \\ \alpha + \beta - 3 \alpha \beta \\ = 5 - 3 \times 6 \\ = 5 - 18 \\ = - 13$

option b is the correct option

plz mark it as the brainliest

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