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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
 10 months ago
 10 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
 10 months ago
 10 months ago

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myininaya Group TitleBest ResponseYou've already chosen the best response.1
\[x^2+bx+(b/2)^2=(x+b/2)^2\]
 10 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?
 10 months ago

youngstar10 Group TitleBest ResponseYou've already chosen the best response.0
14x ?
 10 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
 10 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
 10 months ago

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

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

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

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