2 years ago

Perform the indicated operation and write the result in the form a+bi -8i(-6+2) +7(-2+6i)

Mathematics

2 answers:

sweet-ann [11.9K]2 years ago

7 0

(-8i*-6)+(-8i*2)+(7*-2)+(7*6i)= -48i+-16i-14+42i= -14-22i

3241004551 [841]2 years ago

6 0

Answer:

A. -62+26i

Step-by-step explanation:

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ed fills his sports bottle with 1.2 liters of water after his bike ride he drinks 200 millimeters of water how much water is lef

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Answer:

5/352

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I think

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2 years ago

HELP ASAP PLEASE!!!

grigory [225]

The quadratic fomula:

$ax^2+bx+c=0\\\\\Delta=b^2-4ac\\\\If\ \Delta0,\ then\ \boxed{TWO\ SOLUTIONS:\ x_1=\dfrac{-b-\sqrt\Delta}{2a}\ and\ x_2=\dfrac{-b+\sqrt\Delta}{2a}}-----------------------------------------------$

We have the equation:

$2x^2-7x-21=0\\\\a=2,\ b=-7,\ c=-21\\\\\Delta=(-7)^2-4(2)(-21)=49+168=217 > 0\\\\x_1=\dfrac{-(-7)-\sqrt{217}}{2(2)}=\dfrac{7-\sqrt{217}}{4}\approx-1.93\\\\x_2=\dfrac{-(-7)+\sqrt{217}}{(2)(2)}=\dfrac{7+\sqrt{217}}{4}\approx5.43\\\\Answer:\ \boxed{\boxed{2.\ -1.93\ and\ 5.43}}$

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2 years ago