Question

5. By trial and improvement method,determine the roots of the following quadratic equations.
@iambatman @wio @TheSmartOne @Jhannybean @perl

Answer 1

waiting...

Answer 2

a)x^2+5x+4=0

Answer 3

umm.

Answer 4

what 2 numbers when multiplied equal 4 and when you add tehm 5?

Answer 5

them*

Answer 6

\[2\times2=4\]

Answer 7

try another pair.

Answer 8

but 2x3=6 not 4

Answer 9

there is one last pair...

Answer 10

for example lets do it for 6
6=3x2
6=6x1

Answer 11

that should give it away :P

Answer 12

5-1=4 like this?

Answer 13

@TheSmartOne

Answer 14

wait what do you mean?

Answer 15

what are two numbers that add up to 5 and multiple to 4. when there is a 1 difference you should realize that it is 1 and the number which is getting multiplied...

Answer 16

1+4=5

Answer 17

And 1x4=4

Answer 18

thnx a lt @TheSmartOne

Answer 19

lot*

Answer 20

Well when we factor it we would have
(x+1)(x+4)=0

Answer 21

@MARC_ We are not done yet :P

Answer 22

And then we set it up equal to 0
and we get
x+1=0
x+4=0

Answer 23

The fastest way would just be to graph it and see what the x intercept is. See:
https://www.desmos.com/calculator/r2gwb3uljz

Answer 24

x=-1 and x=-4

Answer 25

thnx again @TheSmartOne

Answer 26

No problem!

Answer 27

And exactly!

Answer 28

:)