Question

1) the roots of equation x²=49 are
______
a)7and-7
b)7and8
c)2and4​

Answer 1

Answer:

7 And - 7

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Answer 2

Answer -

option a) 7 and -7

step by step explaination -

${x}^{2} = 49 \\ substituting \: x = - 7 \: we \: get \: \\ { (- 7)}^{2} = 49 \\ 49 = 49 \\ now \: substituting \: x = 7 \: we \: get \: \: \\ {7 }^{2} = 49 \\ 49 = 49 \\ hence \: answer \: is \: option \: a ) \: 7 \: and \: - 7$