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solve the following by factolisation formula
1. x(2x+1)=0
2.4xsquere-11-3x=0​

Sagot :

KiwiHelp

1.

X = 0

2x + 1 = 0

X = 0

X = - ½ (Because we brought the numbers from one side to the other)

2.

Not sure for number 2.

yohannazenebe66
1. x(2x+1)=0
It means x=0 or 2x+1=0. So
x=0

2x+1=0
2x=-1
x=-1/2


2.

➡️. 4x^2-3x-11=0
(It must take the form of ax^2+bx+c=0)

4x^2-3x=11
➡️ 4x^2-3x+9/4=11+9/4 ( you take the half of the number of 3 from 3x and square it. The half of 3 is 3/2 and when you square it becomes 9/4.)

➡️ 4x^2-3x+9/4=31/4

➡️. [4x^2-3/2]=31/4
( You put 9/4 in square root first. That means 3/2. since 3x is negative you also take negative for 3/2.)

➡️ 4x^2-3/2= positive or negative 31/4.

➡️. 4x^2=31/4+3/2

➡️. 4x^2= 37/4

➡️. x^2= 37/8

➡️. x= the square root of 37/8



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