Simplify (4x − 5)^2.

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Simplify (4x − 5)^2.

Mathematics
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(a+b)^2=a^2 + b^2 + 2ab
does that mean "multiply"? start with \[(4x+5)(4x+5)\] and do four multiplications
(a-b)^2 = a^2 + b^2 -2ab

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Other answers:

oops rather \[(4x-5)(4x-5)\]
thankss(:
do four multiplications, combine like terms, and then tell your teacher (gently) that there is nothing "simpler" about your result than there is in \((4x-5)^2\)
is it 16x+25?
oh no! careful here
four multiplications i will write them out
\[(4x-5)(4x-5)=4x\times 4x-5\times 4x-5\times 4x+5\times 5\]
(4x-5)^2 = 16x^2 -40x +25.
16x-40x+25?
then \(4x\times 4x=16x^2\) \(-5\times 4x-5\times 4x=-20x-20x=-40x\) \((-5)\times (-5)=25\) final answer is \[16x^2-40x+25\]
now factorize it or solve by formula \[x=-b \pm \sqrt{b^{2}-4ac}/2a\]
no marmar it's 16x^2 - 40x +25. not 16x
now use quadratic formula or apply factorization method.it's up to u
U got it marmar? just use formula (a-b)^2 = a^2 + b^2 -2ab. then find x by factorization or quadratic formula.Simple!
yea, thanks guys!

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