Question

factorise x² -7x - 30​

Answer 1

x²-(10-3)x-30

x²-10x-3x-30

x(x-10)-3(x-10)

(x-3)(x-10)

Answer 2

Answer:

x=10 & x= -3

Step-by-step explanation:

Question:  Factorise  x² -7x - 30​ .

To Find: The factors of the quadratic equation  x² -7x - 30​.

Concept: Factorisation of quadratic equations .

Explanation:-

According to the question we have to factorise the quadratic equation

x² -7x - 30​.

⇒  x² -7x - 30​=0

⇒ x²+3x-10x-30 = 0

⇒ x(x+3)-10(x+3) = 0

⇒  (x-10)(x+3) =0

⇒ (x-10) =0 , (x+3)=0

⇒ x= 10, x= -3

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