Add, multiply the given expressions — task. Mathematics State Board, Class 9.

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1. Add the expression

(11 \sqrt{23} + 4 \sqrt{31})

and

(9 \sqrt{31} - 5 \sqrt{23})

2. Multiply the expression

4 \sqrt{11}

and

11 \sqrt{11}

Did you find an error?

7. Add, multiply the given expressions