B, it’s the point that the lines cross
This question seems to me to be an exercise in applying the rule for a difference of squares in order to rewrite the difference of two relatively large numbers as the "simpler" product of other integers.
Step-by-step explanation:
Correction:
1⟩
Given equation is x²-3x = 4
⇛ x²-3x -4 = 0
⇛ x²+x-4x-4 = 0
⇛ x(x+1)-4(x+1) = 0
⇛ (x+1)(x-4) = 0
⇛ x+1 = 0 or x-4 = 0
⇛ x = -1 or x = 4
2.⟩
Given equation is x²+4x+4 = 0
⇛ x²+2x+2x+4 = 0
⇛ x(x+2)+2(x+2) = 0
⇛ (x+2)(x+2) = 0
⇛ x+2 = 0
⇛ x = -2
Answer:
1/ x = 22.5°
2/ x = 60°
Step-by-step explanation:
1/ We have: 3x + 2x + 3x = 180°
=> 8x = 180° => x = 22.5°
2/ We have: x + x + x = 3x = 180°
=> x = 60°
Answer:
of a dress
Step-by-step explanation:
For illustration
If in 3 hours, I sew 6 clothes
In 1 hour, I would sew (6/3) clothes.
Using the same analogy:
In hours, Lucy sews of a dress.
In 1 hour, Lucy will sew dresses
To simplify , We change the division sign to multiplication by taking the inverse of the fraction after the division sign.i.e.
In 1 hour, Lucy sews of a dress.