Hello :
<span>√(4x+13) = 2x-1......(1)
note : if ( a=b) so (a² = b²)
if : (</span>√(4x+13) )²= (2x-1)² so : 4x+13 = 4x²-4x+1
4x²-8x-12 = 0
x²-2x-3 = 0
(x+1)(x-3) = 0
x+1 = 0 or x-3=0
x= -1 or x=3
if : x= -1 : <span>√(4(-1)+13) = 2(-1)-1
</span>√9 =-3 but √9 =3
3 = -3 impossible ( -1 is not solution of equation (1)
if : x = 3 : √(4(3)+13) = 2(3)-1
5 = 5 ( right) conclusion : one solution : 3
21 • (3k + 2m)
Step by step solution :
Step 1 :
Step 2 :
Pulling out like terms :
2.1 Pull out like factors :
9k + 6m = 3 • (3k + 2m)
Final result :
21 • (3k + 2m)
Answer:
this statement is false.
Step-by-step explanation:
cancel equal terms
add the numbers (5+12) (2+14)
17=16
not true.
Let's say TX = 7. TX is equal to XY, so this means TX = XY = 7. So we know XY equals 7, and it's given that XY = YZ. Substitute in 7 for XY and you get 7 = YZ. Since Both TX and YZ are equal to 7, they are equal.
Slope = (6 +9) / (2 +1) = 15/3 = 5
y = mx + b
-9 = 5(-1) +b
b = - 4
equation
y = 5x - 4