exam Maths Puzzle Numerical Ability

Please solve the problem x(3x-7)-20=0. Can you include the steps?

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exam Other Question

tell whether this is always sometimes or never true

the sum of two consecutive even numbers is equal two the sum of two consecutive odd numbers PLEAS HELP TO ADD GROUPING SYMBOLS TO THIS EXPRESSION TO COME OUT TO 279,936-THANKS 2*3^3+4