find the area of a circle with a diameter of four. Either enter an exact answer in terms of Pi or use 3.14 for pi as a decimal
1 answer:
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Answer:
Step-by-step explanation:
1) Reorder the terms:
2) Solving:
3) Add -34 to each side of the equation:
4) Combine like terms: 34 + -34 = 0:
5) Combine like terms: 47 + -34 = 13:
6) Divide each side by -10:
You solve the equation : t^2 - 9t - 90 = 0 ;
Δ = ( - 9 )^2 - 4 * 1 * ( - 90 ) = 81 + 360 = 441 ;
t1 = ( 9 +
) / 2 = 30 / 2 = 15 ;
t2 = ( 9 -) / 2 = -12 / 2 = - 6 ;
The numbers are 15 and - 6 ;
Δ = ( - 9 )^2 - 4 * 1 * ( - 90 ) = 81 + 360 = 441 ;
t1 = ( 9 +
t2 = ( 9 -
The numbers are 15 and - 6 ;