Solve 3x2+48x−12=0 by completing the square.

Step-by-step explanation:

3x²+48x-12=0

divide everithing by 3

x²+16x-4 =0

(a+b)² = a²+ 2ab+ b²

so a=1, 2ab=2*1*b=2b=16 =2*8 therefore b=8

(x+8)²-4 -64 = 0 (make sure you take away the b²=64)

(x+8)² = 68

√(x+8)² = √68

x+8 = ±2√17

x= -8±2√17

7! = 7×6×5×4×3×2

3! = 3× 2

as 7! is multiple of 3! because 7! contains 3! that is 3× 2 as factor

so 7! /(3! ) = 7× 6× 5× 4

= 42 × 20

= 840

its b) 840✌✌✌

dhruv⭐

step-by-step explanation:

circumference divided by 3.141592654 then timesthe radius twice