(algebraic manipulation) to solve 3d only you!

see explanation

Step-by-step explanation:

To add/subtract the fractions we require them to have a common denominator.

The lowest common multiple of 6 and 5 is 30

Note that 1 =

Multiply the numerator/denominator of the first fraction by 5

Multiply the numerator/denominator of the second fraction by 6

= - +

= - +

Distribute and simplify the numerators, leaving the denominator

=

=

a4 - 3a2 - 1

step-by-step explanation:

step   1   :

equation at the end of step   1   :

  ((a4) -   3a2) -   1

step   2   :

trying to factor by splitting the middle term

2.1     factoring   a4-3a2-1  

the first term is,   a4   its coefficient is   1 .

the middle term is,   -3a2   its coefficient is   -3 .

the last term, "the constant", is   -1  

answer: standard form is ax^2 + bx + c = 0

step-by-step explanation:

standard form is ax^2 + bx + c = 0

(2x + 1)(x - 2) = 0

distribute to get into standard form

2x^2 - 4x + x - 2 = 0

2x^2 - 3x - 2 = 0

a = 2, b= -3, c = -2

a is your answer