Question

stiind ca ab=ac=-25,calculati a*(b+c) si a*(b-c)

Answer 1

Răspuns:

a(b+c)=-50

a(b-c)=0

Explicație pas cu pas:

ab=ac= -25

ab+ac= -25+(-25)

a(b+c)=-25-25

a(b+c)= -50

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ab-ac=-25-(-25)

a(b-c)=-25+25

a(b-c)=0