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youngstar10
Group Title
What number must you add to complete the square?
x2 + 14x = 7
A. 196
B. 49
C. 7
D. 14
 9 months ago
 9 months ago
youngstar10 Group Title
What number must you add to complete the square? x2 + 14x = 7 A. 196 B. 49 C. 7 D. 14
 9 months ago
 9 months ago

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myininaya Group TitleBest ResponseYou've already chosen the best response.1
\[x^2+bx+(b/2)^2=(x+b/2)^2\]
 9 months ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
so add to both sides \[(b/2)^2 \] can you guess what b should be?
 9 months ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
well b is just the 14 bx is 14x but our formula calls for just b which is 14
 9 months ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
so plug 14 into that (b/2)^2 thing to figure out your answer as to what to add to both sides in order to complete the square
 9 months ago

youngstar10 Group TitleBest ResponseYou've already chosen the best response.0
oh 196
 9 months ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
\[(\frac{14}{2})^2 \] what is 14/2?
 9 months ago

youngstar10 Group TitleBest ResponseYou've already chosen the best response.0
7 so the answer would be 49
 9 months ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
\[(\frac{14}{2})^2=(7)^2=49\] right
 9 months ago
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