3 years ago

What is the LCM of 3 and 7

Mathematics

2 answers:

Dima020 [189]3 years ago

6 0

Answer:

The LCM of 3 and 7 is 21.

Step-by-step explanation:

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aivan3 [116]3 years ago

6 0

Answer:

Step-by-step explanation:

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use the quadratic formula to find the zeros of the function round to the tense of necessary y= 17x^2-21

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$\text{Use the quadratic formula:}\\\\y=17x^2-21\\\\a=17;\ b=0;\ c=-21\\\\b^2-4ac=0^2-4\cdot17\cdot(-21)=1428\\\\x_1=\dfrac{-b-\sqrt{b^2-4ac}}{2a};\ x_2=\dfrac{-b+\sqrt{b^2-4ac}}{2a}\\\\x_1=\dfrac{-0-\sqrt{1428}}{2\cdot17}=-\dfrac{\sqrt{1428}}{34}\approx-1.1\\\\x_2=\dfrac{-0+\sqrt{1428}}{2\cdot17}=\dfrac{\sqrt{1428}}{34}\approx1.1$

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