24.If a² +b +c=14 and a + b + c = 6, then the value of ab + bc + ca is:
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Answer:
Answer:11
Step-by-step explanation:[a+b+c]^2=a^2+b^2+c^2+2*ab+2*bc+2*ca
such that; 6^2=14+2[ab+bc+ca]
36-14/2=ab+bc+ca
therefore ab+bc+ca=11
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