September 2018 1 27 Report

1.Oblicz skorzystając ze wzoru skrócenego mnożenia :

a)(√2 + 1)(√2-1)

b)(8-5√3)(8+5√3)

2.Wyrażenie (7a-3b)^{2}

a.49a^{2} - 9b^{2}

b. 49a^{2} - 21ab + 9b^{2}

c. 49a^{2} - 42ab + 9b^{2} </p> <p>d. 49a^{2} - 42ab - 9b^{2}

Prosze o uzasadnienie


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