please help i tried answering these questions already and got them wrong !:(

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please help i tried answering these questions already and got them wrong !:(

Mathematics
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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What number needs to be added to complete the square of x2 – 3x = 7? Select one: a. 9/4 b. 3/2 c.-3/2 d.-9/4
What is the vertex of y = x2 – 2x = 7? Select one: a. (1, –8) b. (–1, 8) c. (–1, –8) d. (1, 8)

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$$ x^2-3x=7 $$ To complete the square look at this $$ x^2+bx=c\\ (x+\frac{b}{2})^2=c+\frac{b^2}{4} $$ So in your equation what is b? Then you'll know what to add to complete the square: \(\large \frac{b^2}{4}\). Does this make sense?
mmm im gunna be completly honest and say no , i know i must seem so dumb but i'm really really bad at math and have no clue what im doing ..

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