Question

factorisation of algebraic Q.1 factorise( 1)x²+9x+18 (2)x²-10x+9​

Answer 1

Answer:

The first step of factorising an expression is to 'take out' any common factors which the terms have. So if you were asked to factorise x² + x, since x goes into both terms, you would write x(x + 1) . This video shows you how to solve a quadratic equation by factoring.

Step-by-step explanation:

use this method

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Answer 2

Question :

Q.1 Factorise

1) x²+9x+18.

2) x²-10x+9

Answer:

(In the attachment)

Note :

In this types of question:

1. We find the product of the coefficient of the square term and the constant term.
2. Then we need to find the factors of the product which is always equal to coefficient of the middle term.

Something interesting:

Before , solving this types of questions, we know that we have also learnt to factorise Expressions of the form ax+ay and a²-b²

For example ,

1. 4xy + 8xy² = 4xy ( 1 + 2y)
2. p² - 9q² = (p)² -(3q)² = (p + 3q ) ( p - 3q)