Question (23/147)

Simplify: `(785 xx785 xx785 + 435 xx 435 xx 435)/(785 xx 785 + 435 xx 435 - 785 xx 435)`

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(A)  350

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(B)  785

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(C)  1220

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(D)  1320

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Question (24/147)

if (a + b + c) = 13 and (a² + b² + c²) = 69, then find (ab + bc + ca) ?

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(A)  50

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(B)  60

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(C)  70

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(D)  80

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