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It is easy to multiply numbers by 10: you simply have to add an extra zero at the end.
This means that, using associative property, we know that
87 x 5 x 2=(87 x 5) x 2=87 x (5 x 2)
The last expression is the easiest to compute, because we have
87 x (5 x 2) = 87 x 10 = 870
Hope I helped.
Answer:
D) -4 (with imaginary roots ±2i)
Step-by-step explanation:
Since you cannot take the square root of a negative number to produce a real result, the only option that has two imaginary roots is D) -4, where the two imaginary roots are 2i and -2i.
Answer:
-16
Step-by-step explanation:
8q
Let q = -2
8*-2
-16
