2 years ago

How to solve 8/x^2-1=6/x+1

1 answer:

8 0

You first need to cross multiply to get 8x+8=6x^2-6. Then make the function into 6x^2-8x-14=0 which can be simplified into 3x^2-4x-7=0 by dividing the equation by 2. Then you must split the middle(-4x) to get 3x^2+3x-7x-7=0. This simplifies to 3x(x+1)-7(x+1)=0 and then to (3x-7)(x+1)=0. From here you just solve for each root which you will find are x= -1 and 7/3

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What is a 3 2/3 model example?

Annette [7]

I don't have an exact model but this site can help you.

https://learnzillion.com/lesson_plans/7928-use-models-for-division-of-fractions-by-fractions/

I hope this helps you in your studies and have an awesome day!

8 0

2 years ago

Solving a system of linear equations using the substitution method. <br> 5x+4y=-26<br> 5-x=-6y

yan [13]

Solve for x in 2nd equation
times -1 both sides
x-5=6y
add 5
x=6y+5

sub

5(6y+5)+4y=-26
30y+25+4y=-26
34y+25=-26
minus 25 both sides
34y=-51
divide both sides by 34
y=-3/2
sub back

x=6y+5
x=6(-3/2)+5
x=-18/2+5
x=-9+5
x=-4

(-4,-3/2) is solution

5 0

2 years ago

Read 2 more answers

What is the answer to -3x = 4.2 ?

hammer [34]

Answer:

$- 3x = 4.2 \\ - x = \frac{4.2}{3} \\ - x = 1.4 \\ x = - 1.4 \\ thank \: you$