if a=6,b=3 and c=7 the value of 2a^2 +3b^2-7c^2is
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Answer:
-244
Step-by-step explanation:
2a^2 +3b^2-7c^2
=2(6)^2 +3(3)^2-7(7)^2
=(2X36)+(3X9)-(7X49)
=72+27-343
=99-343
=-244
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