Question

√21+15; √49*√64; √0,36*0,16; 2 √0,04- 3 √0,25

Answer 1

1) 19.58258
2) 7*8=56
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Answer 2

Let's solve each expression step by step:

1. √21 + 15: To add these two expressions, we first need to find the square root of 21 and then add 15 to it. √21 ≈ 4.5826 Now, add 15 to it: 4.5826 + 15 ≈ 19.5826

2. √49 * √64: To multiply these two expressions, we can directly find the square root of 49 and 64, and then multiply them. √49 = 7 √64 = 8 Now, multiply them: 7 * 8 = 56

3. √0.36 * 0.16: To multiply these two expressions, first, find the square root of 0.36 and then multiply it by 0.16. √0.36 = 0.6 Now, multiply by 0.16: 0.6 * 0.16 = 0.096

4. 2√0.04 - 3√0.25: To solve this expression, find the square root of 0.04 and 0.25, and then perform the subtraction as indicated. √0.04 = 0.2 √0.25 = 0.5 Now, perform the subtraction: 2 * 0.2 - 3 * 0.5 = 0.4 - 1.5 = -1.1

So, the results of the expressions are:

1. √21 + 15 ≈ 19.5826
2. √49 * √64 = 56
3. √0.36 * 0.16 = 0.096
4. 2√0.04 - 3√0.25 = -1.1