Question

FACTORISE P(X)= X²-X-42​

Answer 1

Answer:

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Answer 2

Answer:

()=2−−42

Step-by-step explanation:

(x+6)(x−7) is the factorised form of the expression.

Explanation:

x2−x−42

We can Split the Middle Term of this expression to factorise it.

In this technique, if we have to factorise an expression like ax2+bx+c, we need to think of 2 numbers such that:

N1⋅N2=a⋅c=1⋅(−42)=−42

and

N1+N2=b=−1

After trying out a few numbers we get N1=−7 and N2=6

6⋅(−7)=−42 and 6+(−7)=−1

x2−x−42=x2−7x+6x−42

=x(x−7)+6(x−7)

(x+6)(x−7) is the factorised form of the expression