Multiply (5x+4) (5x+4)?

2009-08-27 6:06 pm

First right Best Answer

回答 (7)

2009-08-27 6:08 pm

✔ 最佳答案

25x^2 + 40x + 16

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2009-08-28 1:13 am

NEEEEEERRRRRRDDDDDDDSSSSSSS!!!!!!!!!

- Ogre

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2009-08-28 1:14 am

(5x+4)(5x+4) = (5x+4)^2 = 25x^2 +40x + 16

I prefer writing the answer like that (5x+4)^2 instead of 25x^2 +40x + 16, but that's just me

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2009-08-28 1:38 am

25 x^2 + 40 x + 16

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2009-08-28 1:37 am

(5x + 4)(5x + 4)
= 5x(5x) + 5x(4) + 4(5x) + 4(4)
= 25x^2 + 20x + 20x + 16
= 25x^2 + 40x + 16

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2009-08-28 1:20 am

if 5x+4=Y
->(5x+4) (5x+4) ->Y.Y = z
if z=4
then (5x+4) (5x+4)=4

ur welcome :)

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2009-08-28 1:12 am

(5x+4) (5x+4) = (5x+4)^2

w.k.t (a=b)^2 = a^2 + 2ab + b^2

===> (5x+4)^2 = 25x^2 + 40x + 16

==> 25x^2 + 40x + 16

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