Question

2 X square + 20 is equal to 220​

Answer 1

Answer:

$2x {}^{2} + 20 = 220 \\ 2x {}^{2} = 200 \\ x {}^{2} = 100 \\ \\ x = \sqrt{100} \\ = \\ =$

Answer 2

Answer:

x = 10

Explanation:

2x² + 20 = 220

Subtracting both sides by 20 we get,

2x² + 20 - 20 = 220 - 20

2x² = 200

Now dividing both sides by 2 we get,

2x² ÷ 2 = 200 ÷ 2

x² = 100

Taking root on both sides we get,

√x² = √100                                          ( You can simply use prime

 x = 10                                                 factorization if you don't know

                                                              the advanced method.

                                                              As 100 = 2 x 2 x 5 x 5

                                                               √100 would be 2 x 5 = 10 )

Hope this helps.

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