Question

100-9x
$100 - 9 {x}^{2}$
​

Answer 1

Answer:-

=100-9x²

=10²-(3x)²

It is of the form a²-b²=(a+b)(a-b)

So,

=(10+3x)(10-3x)

If,

(10+3x)(10-3x)=0

Then

10+3x=0 10-3x=0

x=-10/3 x=10/3

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Answer 2

100-9x^2
(10)^2-(3x)^2
(a^2-b^2)=(a+b)(a-b)
(10)^2-(3x)^2
(10+3x)(10-3x)