Use FOIL
28x² -8xy +7xy -2y²
28x² -xy -2y²
◆ COMPLEX NUMBERS ◆
125 ( cos 288 + i sin 288 ) can be written as -
125.e^i( 288)
125.e^i( 288 +360 )
125.e^i( 288+ 720)
[ As , multiples of 360 can be added to an angle without changing any trigonometric functions or sign ]
To find the cube root , take the cube root of above 3 expressions ,
We get -
5 e^( i 96 )
5 e^( i 216 )
5 e^( i 336 )
Now using Euler's formula , We rewrite above as -
5 ( cos 96 + i sin 96 )
5(c os 216 + i sin 216 )
5 ( cos 336 + i sin 336 ) Ans.
Answer:
That equation is (2.5×2). The mean of the K is ×2
6(21)=72 6(31)=186
add 72+186=258
258 is the answer
Answer:
i think the awnser is c . if unattended, leave the horse tire up
