Step-by-step explanation:
well,
(y - 7)² = (y - 7)(y - 7)
remember how to multiply 2 expressions ?
you have to multiply every term of one expression with every term of the other expression and sum the results all up (incl. considering their individual signs, of course).
so, when we do the multiplication, we get
(y - 7)(y - 7) = y×y - 7×y - 7×y + (-7)×(-7) =
= y² - 14y + 49
and that is clearly different to y² - 49
FYI
y² - 49 is the result of
(y - 7)(y + 7)
because
y×y + 7×y - 7×y + (-7)(7) = y² - 49
Answer:
4.5
Step-by-step explanation:
43-32+2-4= 9
9/2= 4.5
Answer:
She buys 5 boxes of popcorn and 6 boxes of candy
Step-by-step explanation:
this is because 5 times 4.00 is 20$ and 2.50 times 6 is 15$
15 + 20 is 35
so your answer is 5 boxes of popcorn and 6 boxes of candy
hope this helped :D
Answer:
Step-by-step explanation:
the 3 equation can not be factorised. Because they will result to fraction
