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Alexandramorales24
Group Title
Given the following perfect square trinomial, fill in the missing term. (Do not type the variable in the blank.)
4x2 + ___x + 49
 2 years ago
 2 years ago
Alexandramorales24 Group Title
Given the following perfect square trinomial, fill in the missing term. (Do not type the variable in the blank.) 4x2 + ___x + 49
 2 years ago
 2 years ago

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cwrw238 Group TitleBest ResponseYou've already chosen the best response.1
the two square roots involved are 2 and 7 so arithmetic on these will give you the missing number
 2 years ago

amistre64 Group TitleBest ResponseYou've already chosen the best response.2
well, our options for this would suggest that: (2x)^2 + nx + (7)^2 comes form either: (2x+7)^2 or (2x7)^2 ; the + on the middle term would indicate the first
 2 years ago

Savvy Group TitleBest ResponseYou've already chosen the best response.0
since 49 is apart of the square a term must be its square root i.e. 7 and sincce the other square term is 4x^2...then the term before squaring must be its square root i.e. 2x... so (2x + 7)^2 = 4x^2 + 28x + 49
 2 years ago

ZhangYan Group TitleBest ResponseYou've already chosen the best response.3
The answer would be 4x^2+ 14x+49 You take the square root of 49 and then take that answer (which is 7) and multiply it by 2. Hope this helps!
 2 years ago

amistre64 Group TitleBest ResponseYou've already chosen the best response.2
Zhang, that only works if the first term is an x^2; we got a 4 in the way this time to do that we would have to divide off the 4 and work it out
 2 years ago

amistre64 Group TitleBest ResponseYou've already chosen the best response.2
but, i spose the wrong answer is the best answer :) lol
 2 years ago

amistre64 Group TitleBest ResponseYou've already chosen the best response.2
yes, it is
 2 years ago

amistre64 Group TitleBest ResponseYou've already chosen the best response.2
(2x+7)^2 = 4x^2 +28x + 49
 2 years ago

ZhangYan Group TitleBest ResponseYou've already chosen the best response.3
@amistre64 is my answer is wrong??
 2 years ago

amistre64 Group TitleBest ResponseYou've already chosen the best response.2
you should be able to dbl chk it to determine that, but as is, your answer is wrong. You did not account for the 4 on the first term
 2 years ago

ZhangYan Group TitleBest ResponseYou've already chosen the best response.3
oh right lol sorry it was 28
 2 years ago

amistre64 Group TitleBest ResponseYou've already chosen the best response.2
(ax+b)^2 = (ax)^2 + 2ab x + b^2 sqrt(b^2) * 2 = 2b but that only works if a=1, otherwise we have to adjust it for a
 2 years ago
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