Answer:
B. 140 degrees
Step-by-step explanation:
Edge 2020
Answer:
see explanation
Step-by-step explanation:
Given
x² + 4x - 7 = 0 ( add 7 to both sides )
x² + 4x = 7
To complete the square
add ( half the coefficient of the x- term )² to both sides
x² + 2(2)x + 4 = 7 + 4
(x + 2)² = 11 ( take the square root of both sides )
x + 2 = ±
( subtract 2 from both sides )
x = - 2 ± 
Thus
x = - 2 -
≈ - 5.32 ( to 2 dec. places )
x = - 2 +
≈ 1.32 ( to 2 dec. places )
PEMDAS
P - Parentheses (or other grouping symbols)
E - Exponents
M - Multiplication
D - Division
A - Addition
S - Subtraction
![8x[(7+4)x^2] - [(11-7)x^4]\\ \\ 8x[(11)x^2] - [(4)x^4] \\ \\ 8x[11x^2] - [4x^4] \\ \\ 88x^3 - 4x^4 \\ \\ -4x^4+88x^3](https://tex.z-dn.net/?f=8x%5B%287%2B4%29x%5E2%5D%20-%20%5B%2811-7%29x%5E4%5D%5C%5C%20%20%5C%5C%208x%5B%2811%29x%5E2%5D%20-%20%5B%284%29x%5E4%5D%20%5C%5C%20%20%5C%5C%208x%5B11x%5E2%5D%20-%20%5B4x%5E4%5D%20%5C%5C%20%20%5C%5C%2088x%5E3%20-%204x%5E4%20%5C%5C%20%20%5C%5C%20-4x%5E4%2B88x%5E3%20)
If you then want to go on to factor it, your answer would be