Wyznacz wartosci parametrow a i b tak , aby wielomiany W(x)=(25x(do kwadratu)+ax+1)(4x(do kwadratu)-9) i F(x)=(2x-b)(5x+1)do potegi drugiej(2x+b) byly rowne . W odpowiedziach jest a=10 b=3 lub a=10 b=-3
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[25x²+ax+1][4x²-9]=[2x-9][5x+1]²[2x+b]
100x⁴-225x²+4ax³-9ax+4x²-9=[4x²-b²][25x²+10x+1]
100x⁴-221x²+4ax³-9ax-9=100x⁴+40x³+4x²-25x²b²-10xb²-b²
100x⁴+4ax³-221x²-9ax-9=100x⁴+40x³+4x²-25x²b²-10xb²-b²
b²=9
b=3 lub b= -3
100x⁴+4ax³-221x²-9ax-9=100x⁴+40x³+4x²-25x²×3²-10x×3²-3²
100x⁴+4ax³-221x²-9ax-9=100x⁴+40x³+4x²-225x²-90x-9
100x⁴+4ax³-221x²-9ax-9=100x⁴+40x³-221x²-90x-9
4ax³=40x³ /:4x³
-9ax=-90x/:-9x
a=10
a=10
a=10
b=3 lub b=-3