Question

Give me answer of all question please..............

Answer 1

Answer:

hope this helps u :-)

Step-by-step explanation:

1)2x-7=0

=>2x=7

=>x=7/2

so, option a is correct.

2)9x+4=0

=>9x= -4

=>x= -4/9

so option c is correct.

3)p(x)=x²-1

if p(1)=1²-1=0

p(x)=x²-1

if p(-1)=(-1)²-1=1-1=0

so the zeroes of x²-1 are 1 and -1.therefore option a is right.

4)(x-1)(x-2)

=x(x-2)-1(x-2)

=x²-2x-x+2

=x²+3x+2

p(x)=x²+3x+2

if p(-1)=(-1)²+3(-1)+2=3-3=0

if p(-2)=(-2)²+3(-2)+2=4+2-6=6-6=0

so, the zeroes of (x-1)(x-2) are -1 and -2.therefore option d is right.

5)lx+m=0

=>lx= -m

=>l= -m/l

so, option c is correct.

6)5x-π=0

=>5x=π

=>x=π/5=π(1/5)

so, option b is correct.

7)after dividing x³+3x²+3x+1 the quotient is x²+3x+3 and the remainder is 1.

so, option a is correct.

8)

9)

10)x-2=0

=>x=2

putting the value of x in the given equation

x³-3x+5a=0

=>(2)³-3(2)= -5a

=> 8-6= -5a

=> -5a=2

=>a= 2/-5= -2/5

so, option d is correct.