2.
If a+b+c= 7 and ab + bc + ca = 15, then find a + b2 + c2.
it's urgent pls answer it
Answers
Answered by
1
Answer:
if it's a²+b²+c²
Step-by-step explanation:
the answer is 19
a2+b2+c2=(a+b+c)²-2(ab+bc+ca)
=7²-2×15
=49-30
=19
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