(A) Given the operation $a * b = 2a - 3b + ab$.First,calculate $3 * 5$:$3 * 5 = (2 \times 3) - (3 \times 5) + (3 \times 5) = 6 - 15 + 15 = 6$.Next,cal

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(A) Given the operation $a * b = 2a - 3b + ab$.First,calculate $3 * 5$:$3 * 5 = (2 \times 3) - (3 \times 5) + (3 \times 5) = 6 - 15 + 15 = 6$.Next,calculate $5 * 3$:$5 * 3 = (2 \times 5) - (3 \times 3) + (5 \times 3) = 10 - 9 + 15 = 16$.Finally,add the two results:$3 * 5 + 5 * 3 = 6 + 16 = 22$.

Competitive Quantitative Aptitude Number system Simplification

Medium

If $a * b = 2a - 3b + ab$,then $3 * 5 + 5 * 3$ is

A
$22$
B
$24$
C
$26$
D
$28$

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$\frac{5}{6} \div \frac{6}{7} \times ? - \frac{8}{9} \div 1 \frac{3}{5} + \frac{3}{4} \times 3 \frac{1}{3} = 2 \frac{7}{9}$

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What will come in the place of the question mark $(?)$ in the following equation?
$(21)^{2} - 3717 \div 59 = ? \times 8$

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The value of $\frac{1}{a^{2}+a x+x^{2}}-\frac{1}{a^{2}-a x+x^{2}}+\frac{2 a x}{a^{4}+a^{2} x^{2}+x^{4}}$ is

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The value of $\left\{\left(\sqrt[n]{x^{2}}\right)^{n / 2}\right\}^{2}$ is

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$67.99 \%$ of $1401 - 13.99 \%$ of $1299 = ?$

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If $a * b = 2a - 3b + ab$,then $3 * 5 + 5 * 3$ is

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$\frac{5}{6} \div \frac{6}{7} \times ? - \frac{8}{9} \div 1 \frac{3}{5} + \frac{3}{4} \times 3 \frac{1}{3} = 2 \frac{7}{9}$

What will come in the place of the question mark $(?)$ in the following equation?$(21)^{2} - 3717 \div 59 = ? \times 8$

The value of $\frac{1}{a^{2}+a x+x^{2}}-\frac{1}{a^{2}-a x+x^{2}}+\frac{2 a x}{a^{4}+a^{2} x^{2}+x^{4}}$ is

The value of $\left\{\left(\sqrt[n]{x^{2}}\right)^{n / 2}\right\}^{2}$ is

$67.99 \%$ of $1401 - 13.99 \%$ of $1299 = ?$

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What will come in the place of the question mark $(?)$ in the following equation?
$(21)^{2} - 3717 \div 59 = ? \times 8$