Question

if one root of the quadratic equation px2- 3x+4 =0 is -4 find the value of p and other root​

Answer 1

Step-by-step explanation:

p(-4)^2-3(-4)+4=0

16p+12+4=0

16p+16=0

p=-1

eq become

-x^2-3x+4=0

x^2+3x-4=0

x^2+4x-x-4=0

x(x+4)-1(x+4)=0

(x+4)(x-1)=0

x=-4,1