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3 years ago

9xsquared -49 factorise

Mathematics

2 answers:

Shtirlitz [24]3 years ago

8 0

Answer:

(3x-7)(3x+7)

Step-by-step explanation:

3^2 * x^2 -7^2 (expand that out)

(3x)^2 - 7^2

(3x-7)*(3x+7)

Elis [28]3 years ago

7 0

Answer:

(3x+7)(3x-7)

Step-by-step explanation:

Applying the Difference of Two Squares(D.O.T.S) formula:

$x^{2} -y^{2} =(x+y)(x-y)$

9x²= (3x)²

49=7²

Put 3x as x and 7 as y into the D.O.T.S formula:

(3x+7)(3x-7)

Mark as Brainliest please

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Step-by-step explanation:

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