Question

pls solve it



it's urgently required...

Answer 1

Addition : -

(i) = 12+(-11)
= 12-11 = 1
(ii) = 9√2 - 3√2
= (9-3) √2
= 6√2

Subtraction :-
(i) = 12-3/4
= 48-3/4
= 45/4 = or 11.25

(ii) = 2√5 - 9√-5
= -7√5

Multiplication :-

(i) = 9√2 × 5√7
= 45√14
(ii) = 9√2 × -3√2
= -27 × (√2)²
= -27 × 2
= - 54

Division :-
(i) =
$\: \: \: \frac{12}{9 \sqrt{2} } \\ \frac{12(9 \sqrt{2}) }{9 \sqrt{2} \times 9 \sqrt{2} } = \frac{108 \sqrt{2} }{81 \times 2} = \frac{108 \sqrt{2} }{162}$
(ii) =
$\frac{ - 11}{3 \sqrt{11} } = \frac{ - 11 \times 3 \sqrt{11} }{3 \sqrt{11} \times 3\sqrt{11} } = \frac{ - 33 \sqrt{11} }{9 \times 11} = \frac{ - 33 \sqrt{11} }{99}$