Question

tell me ans of this MCQ without steps give direct ans​

Answer 1

Answer:

1) c) 2.

2) a) 1.

It's 100% correct answer.

Answer 2

Step-by-step explanation:

1)Given polynomial p(x)=2x²+kx

given divisor =x+1

by factor theorem if (x-a) is a factor of p(x) if p(a)=0

now

x+1 is a factor then p(-1)=0

=>p(-1)=2(-1)²+k(-1)=0

=>2(1)-k=0

=>k=2

The value of k=2

now 0+k=0+2=2

option c

2)Given that (2+√3)(2-√3)

This is in the form of (a+b)(a-b)

here a=2 and b=√3

we know that

(a+b)(a-b) =a²-b²

=>(2+√3)(2-√3)

=>2²-(√3)²

=>4-3

=>1

The value of (2+√3)(2-√3)=1

Option a