Felix surrounds a 12 in. by 8 in. photo with a frame that is x inches wide. which quadratic function represents the combined are
1 answer:
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Standard form is a+bi where a and b are real numbers
remeber that i²=-1
ok
we got to get the i out of the denomenator
remember the differnce of 2 perfect squares where (a-b)(a+b)=a²-b²
so multiply the whole thing by
we get
in standard form, it is
remeber that i²=-1
ok
we got to get the i out of the denomenator
remember the differnce of 2 perfect squares where (a-b)(a+b)=a²-b²
so multiply the whole thing by
we get
in standard form, it is
Answer:
d
Step-by-step explanation:
by using the a²+b²=c²
c²=