Question

factorise using algebraic identities I)49q²-42qr+9r²​

Answer 1

Step-by-step explanation:

Answer...................

Answer 2

$(7q-3r)^{2}$

49q²-42qr+9r²​

This equation can be written in the form of

(7q)²- (2)(7)(3)qr+(3r)²​

This is in the form $a^{2}-2ab+b^{2}$,Where a= 7q  and b= 3r

$a^{2}-2ab+b^{2}$ = $(a-b)^{2}$

Applying to the above equation we get,

$(7q-3r)^{2}$

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