Question

factorise x2-2x-3=0​

Answer 1

Answer:

(x-3)(x+1)

Step-by-step explanation:

x2+x-3x-3=0

x(x+1)-3(x+1)

(x-3)(x+1)

Answer 2

The value of x is 3 or -1.

• The positive integers that can divide a number evenly are known as factors in mathematics. Let's say we multiply two numbers to produce a result. The product's factors are the number that is multiplied. Each number has a self-referential element.
• There are several examples of factors in everyday life, such putting candies in a box, arranging numbers in a certain pattern, giving chocolates to kids, etc. We must apply the multiplication or division method in order to determine a number's factors.
• The numbers that can divide a number exactly are called factors. There is therefore no residual after division. The numbers you multiply together to obtain another number are  called factors. A factor is therefore another number's divisor.

Here, according to the given information, we are given that,

$x^{2} -2x-3=0.$

Or, $x^{2} -3x+x-3=0$

Or, $x(x-3)+1(x-3)=0.$

Or, $(x+1)(x-3)=0.$

Then, the value of x is 3 or -1.

Hence, the value of x is 3 or -1.

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