Sabrina556
Answered

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[tex] {x}^{2} - 21 = 79[/tex]
plz help it's due it 2 min​

Sagot :

DᴀʀᴋPᴀʀᴀᴅᴏx

[tex]\qquad \qquad\huge \underline{\boxed{\sf ᴀɴsweʀ}}[/tex]

Let's solve ~

[tex]\qquad \sf  \dashrightarrow \: {x}^{2} - 21 = 79[/tex]

[tex]\qquad \sf  \dashrightarrow \: {x}^{2} = 79 + 21[/tex]

[tex]\qquad \sf  \dashrightarrow \: x {}^{2} = 100 [/tex]

[tex]\qquad \sf  \dashrightarrow \: x = \pm\sqrt{100} [/tex]

[tex]\qquad \sf  \dashrightarrow \: x = \pm \sqrt{10 \times 10} [/tex]

[tex]\qquad \sf  \dashrightarrow \: x = \pm10[/tex]

donovanbunn121
x= 10
x= -10

Use the quadratic formula to show your work.
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