A student is converting a quadratic from vertex form to standard form, but there is a mistake. Identify the step that contains the mistake and the correction. STEP 1 y=2(x-5)^2 -1 correct
STEP 2 y=2(x^2+25)-1 this could be incorrect
STEP 3 y=2x^2-50-1 this could also be incorrect
STEP 4 y=2x^2-51 correct
CORRECTIONS BELOW...
a. step 2 y=2(x^2-10)-1
b. step 2 y=2(x^2-10x+25)-1
c. step 3 y=2x^2-25-1
d. step 4 y=2x^2-49
PLEASE HELP ME

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Se tiene en una caja de canicas 10, 4 blancas y 6 negras ¿cual es la probabilidad que en 2 extracciones con reemplazo sean blancas? ¿cual es la probalidad que en 2 extracciones sin reemplazo sean negras?

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