Question

If p,q are the zeros of x square -5x +6 find the value of p+q-3pq

Answer 1

Answer:

-13

Step-by-step explanation:

p and q are zeroes of  x² - 5x +6 .

∴ $x^{2} -5x+6=0$  at x = p and x= q

∴ $x^{2} -3x-2x+6=0\\x(x-3)-2(x-3)=0\\(x-2)(x-3)=0\\Therefore,\\ p=2\\q=3$

So,

p+q-3pq = 2+ 3 -3*2*3  = 5- 18 = -13