Question

there are 4 questions
please solve them.
:)​

Answer 1

Answer:

Answer 8:-

6x²+x-2=6x²+4x-3x-2=2x(3x+2)-1(3x+2)

=(3x+2)(2x-1)

x=-2/3 or x=1/2

the to find the value of a/b+b/a

then a/b+b/a=a²+b²/ab=(a²+b²)-2ab/ab

=(a+b)²-2ab/ab

=(-2/3+1/2)²-2×-2/3×1/2/-2/3×1/2

=1/36+2/3/-1/3=1+24/36/-1/3

=25/36×-3=-25/12

Answer 9:-

sum and product of the equation is given

so x²-(a+b)x+ab

=x²-(-3/2√5)x+(-1/2)

=x²+3/2√5x-1/2

Answer 10:-

f(x)=ax³+bx²+cx+d

:- a-b+c=-b/a

ab+bc+ca=c/a

abc=-d/a

then 1/a+1/b+1/c=ab+bc+ca/abc

=c/a/-d/a=-c/d