Solve by completing the square: x^2+3x-70=0 ( -10, 7)

x^2=-10x-30 ( { })

help and with explanation; will give brainliest

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step-by-step explanation:

sin(7pi/6 - pi/3)  

= sin(7pi/6 - 2pi/6)  

= sin(5pi/6)  

= sin(pi - pi/6)  

= sin(pi/6)  

= 1/2  

sin 7pi/6 - sin pi/3  

= sin (pi + pi/6) - sin pi/3  

= -sin pi/6 - sin pi/3  

= -1/2 - sqrt(3)/2  

= -(1+sqrt(3))2

answer: 40392

step-by-step explanation:

10098 x 4 = 40392