Question

4) A quadratic polynomial, whose zeros are -4 and 7 is
a) 2
b) 3
c)4
d) none of these​

Answer 1

✒Question :

4) A quadratic polynomial, whose zeros are -4 and 7 is

a) 2

b) 3

c)4

d) none of these

✒Answer :

$\alpha + \beta = - 4$

$\alpha \beta = 7$

$k{x} = {x}^{2} - (\alpha + \beta ) x+ \alpha \beta$

$= {x}^{2} - ( - 4)x + 7$

$= {x}^{2} + 4x + 7$

.: x^2+4x+7 is a quadratic polynomial .

option d)None of these .

✨HOPE IT HELPS YOU :-)