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FaisalAyazBest ResponseYou've already chosen the best response.0
(a+b)^2=a^2 + b^2 + 2ab
 one year ago

satellite73Best ResponseYou've already chosen the best response.1
does that mean "multiply"? start with \[(4x+5)(4x+5)\] and do four multiplications
 one year ago

FaisalAyazBest ResponseYou've already chosen the best response.0
(ab)^2 = a^2 + b^2 2ab
 one year ago

satellite73Best ResponseYou've already chosen the best response.1
oops rather \[(4x5)(4x5)\]
 one year ago

satellite73Best ResponseYou've already chosen the best response.1
do four multiplications, combine like terms, and then tell your teacher (gently) that there is nothing "simpler" about your result than there is in \((4x5)^2\)
 one year ago

satellite73Best ResponseYou've already chosen the best response.1
oh no! careful here
 one year ago

satellite73Best ResponseYou've already chosen the best response.1
four multiplications i will write them out
 one year ago

satellite73Best ResponseYou've already chosen the best response.1
\[(4x5)(4x5)=4x\times 4x5\times 4x5\times 4x+5\times 5\]
 one year ago

FaisalAyazBest ResponseYou've already chosen the best response.0
(4x5)^2 = 16x^2 40x +25.
 one year ago

satellite73Best ResponseYou've already chosen the best response.1
then \(4x\times 4x=16x^2\) \(5\times 4x5\times 4x=20x20x=40x\) \((5)\times (5)=25\) final answer is \[16x^240x+25\]
 one year ago

FaisalAyazBest ResponseYou've already chosen the best response.0
now factorize it or solve by formula \[x=b \pm \sqrt{b^{2}4ac}/2a\]
 one year ago

FaisalAyazBest ResponseYou've already chosen the best response.0
no marmar it's 16x^2  40x +25. not 16x
 one year ago

FaisalAyazBest ResponseYou've already chosen the best response.0
now use quadratic formula or apply factorization method.it's up to u
 one year ago

FaisalAyazBest ResponseYou've already chosen the best response.0
U got it marmar? just use formula (ab)^2 = a^2 + b^2 2ab. then find x by factorization or quadratic formula.Simple!
 one year ago
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