# ACT Math 1.4 Intermediate Algebra

ACT Math Intermediate Algebra Drill 1, Problem 4. Solve for x based on the equation.

ACT Math | Intermediate Algebra |

ACT Mathematics | Intermediate Algebra |

Algebra | Factoring |

Elementary Algebra | Solve quadratic equations by factoring |

Foreign Language | Arabic Subtitled Chinese Subtitled Korean Subtitled Spanish Subtitled |

Intermediate Algebra | Quadratic equations (Quadratic Formula) |

Language | English Language |

Product Type | ACT Math |

### Transcript

So... let's do it.

We have x times the quantity x plus 6.

So... x has to equal at least 0 here because 0 squared is 0 and 6 times 0 is... also zero.

But what else can x be? Well, we have this quantity here; x plus 6.

So... if x was NEGATIVE 6, this piece would be zero... and zero times anything is zero...

so negative 6 works as well.

...and our answer is D.