Question

factorise the following expressions.
y²-8y+7​

Answer 1

Answer:

y = 7 and y = 1

Step-by-step explanation:

1.  $y^{2} -8y+7=0$

 $=y^{2} -7y-y+7=0$

 $=y(y-7)-1(y-7)=0$

 $=(y-7)(y-1)=0$

 = y-7 = 0     and    y-1 = 0

 = y = 7        and     y = 1

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