= > x² + 7x + 12 = 12
= > x² + ( 4 + 3 )x + 12 = 12
= > x² + 4x + 3x + 12 = 12
= > x( x + 4 ) + 3( x + 4 ) = 12
= > ( x + 4 ) ( x + 3 ) = 12
Percy did correct till this step. But by doing like this, Percy can't get the values of the variable x.
Percy should follow the following steps :
= > x² + 7x + 12 = 12
Add -12 on both sides,
= > x² + 7x + 12 - 12 = 12 - 12
= > x² + 7x = 0
= > x( x + 7 ) = 0
= > ( x = 0 ) or ( x + 7 = 0 )
= > ( x = 0 ) or ( x = - 7 )
Hence, required value(s) of x is 0 or -7
Im in fifth grade too. that was on my homework it confused me so much
Answer:
Step-by-step explanation:
1. A cell is identified by its ........
a. Cell pointer b. cell address c. Box
2. When you measure cones, in which directions you should click on the dots
representing cones.
a. clockwise b. Anticlockwise c. Straight
3. Name the software that can make models of molecules included in
GNU/Linux ?
a. Geogebra b. Kalzium c. Ghemical
4. The abbreviation for Physics Education Technology?
a. PhET b. PHET c. PheT
5. For giving background colour to a slide, click ................. in Slide Menu
a. Character b. Properties c. Paragraph
Answer:
5 gallons would be left in the tank after 4 hours.
Step-by-step explanation:
(how much is t hours)