Question
I. x2 + 13x + 42 = 0 II. y² + 13y
+ 40 = 0 In each of the following questions, there are two equations. You have to solve both equations and mark the correct answer.Solution
I. x2 + 13x + 42 = 0 => x2 + 7x + 6x + 42 = 0 => x(x + 7) + 6(x + 7) = 0 => (x + 7) (x + 6) = 0 => x = -7, -6 II. y² + 13y + 40 = 0 => y2 + 8y + 5y + 40 = 0 => y(y + 8) + 5(y + 8) = 0 => (y + 8) (y + 5) = 0 => y = -8, -5 Hence, the relationship cannot be established between x and y.
If x stands for ‘addition’, ÷ stands for ‘subtraction’, + stands for ‘multiplication’, and – stands for ‘division’, then 30 x 40 – ...
If ‘ + ’ means ' × ', ‘ – ’ means ' ÷ ' , ‘×’ means '+' and ‘÷’ means '–', Then compute the value of the expression: 54 – 9 ...
If ‘+’ means ‘-’, ‘×’ means ‘+’, ‘-’ means ‘÷’ and ‘÷’ means ‘×’, then what is the value of the following expression...
What will be the value of expression if the numbers/digits ‘(30)’ and ‘(13)’ are interchanged?
78 ÷ 30 × 6 + 13 - 14 + 12
...If '+' means '-', '×' means '+', '-' means '÷', and '÷' means '×', then what is the value of the following expression?
75 ÷ 5 + 312 × 18 - ...
If '+' means ' - ', ' X ' means '+', ' - ' means '÷' and '÷' means ' X ', then what is the value of the following expression?
14 ÷ 5 x 63 - 9 ...
Read the directions carefully and answer the following questions.
If ' + ' means '-', ' × ' means '+', ' - ' means '÷', and ' ÷ ' means '×'...
Select the correct sequence of mathematical signs to replace the ‘@’ signs so as to balance the given equation.
264 @ 44 @ 17 @ 6 @ 32 = 76
If P means ‘multiplied by’, T means ‘subtracted from’, M means ‘added to’ and B means ‘divided by’, then 40 B 8 P 8 T 14 M 9 = ?
...If '÷' means '+', '+' mean '-', 'x' means '÷' and '-' means 'x', then what will be the value of the given expression:
12 – 6 x 2 + 5 ÷ 9
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