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Question Number 104640 by Anindita last updated on 22/Jul/20

1 . What is the brief word of LCM ?

2 . If x = 3 and y = 6 then what is the

answer of \frac{x^{2} + 2 xy + y^{2}}{3 x + 5 y \times 9 xy} ?

3 . If a * b = \frac{a \times b}{a \div b} then what is the

answer of 2 * 3 + 7 * 5 - 9 * 6 ?

4 . What is the brief word of GCD ?

What is the GCD of 12, 56, 80 ?

5 . Solve that

[\begin{matrix} 1 & 6 & 7 \\ 2 & 8 & 9 \\ 3 & - 3 & - 6 \end{matrix}] + [\begin{matrix} 6 & 7 & 12 \\ - 6 & 9 & 45 \\ - 8 & 6 & - 3 \end{matrix}] .

Answered by Rasheed.Sindhi last updated on 23/Jul/20

1 . LCM stands for^{'} L e a s t C o m m o n

M u l t i p l e^{'} .

2 . \frac{x^{2} + 2 xy + y^{2}}{3 x + 5 y \times 9 xy} = \frac{{(3)}^{2} + 2 (3) (6) + {(6)}^{2}}{3 (3) + 5 (6) \times 9 (3) (6)}

= \frac{9 + 36 + 36}{9 + 30 \times 162} = \frac{81}{9 + 4860}

= \frac{81}{4869} = \frac{9}{541}

3 . 2 * 3 + 7 * 5 - 9 * 6 = \frac{2 \times 3}{2 \div 3} + \frac{7 \times 5}{7 \div 5} - \frac{9 \times 6}{9 \div 6}

= (2 \times 3) (\frac{3}{2}) + (7 \times 5) (\frac{5}{7}) - (9 \times 6) (\frac{6}{9})

= (3) (3) + (5) (5) - (6) (6) = 9 + 25 - 36

= - 2

4 . GCD s t a n d s f o r^{'} G r e a t e s t

C o m m o n {D i v i s o r}^{'}