Question

If $x^{2} +7=21$ then what is the value of $x^{2} +3?$

Answer 1

Answer:

${x}^{2} + 7 = 21 \\ {x}^{2} = 14 \\ x = \sqrt{14} \\ \\ x {}^{2} + 3 \\ = 14 + 3 \\ = 17$

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Answer 2

X2 = 21-7
X2 = 14
X= 14-2
X = 12