Question

b) √324+ x = 20% of 1000.​

Answer 1

When you get a question like this and you want to try to solve it without a calculator, it helps to factorise the big number to see whether it can be written as a product (multiplication) of factors that might be squares. 324 = 4 x 81 , so:

324 = (2 squared) x (9 squared), & you can write 324 = (2 x 9) squared, or:

324 = 18 squared. Therefore the square root of 324 is 18.

Answer 2

Answer:

182

Step-by-step explanation:

√324+ x = 20% of 1000.

$\frac{20}{100}$ of 1000 = 200

√324+ x = 200

$\sqrt{18^{2} }$ + x = 200

x = 200 - 18 = 182