Answer:
C
Step-by-step explanation:
In this technique, if we have to factorise an expression like ax2+bx+c, we need to think of 2 numbers such that:
N1⋅N2=a⋅c=1⋅−12=−12
AND
N1+N2=b=−1
After trying out a few numbers we get N1=3 and N2=−4
3⋅−4=−12, and 3+(−4)=−1
x2−x−12=x2−4x+3x−12
x(x−4)+3(x−4)=0
(x+3)(x−4)=0
Now we equate the factors to zero.
x+3=0,x=−3
x−4=0,x=4
Answer:
The top right option.
Step-by-step explanation:
I did some math and i got this
x = -2
Answer:
See picture attached
Step-by-step explanation:
I hope this helps you.
Please give me brainliest if it's correct
Answer:
look at the picture
Step-by-step explanation:
for the triangles with lines on the sides, heres what it means:
The dashes on the lines show they are equal in length.