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