Answer:
Enabled the development of an atomic weapon based on the the theories of German scientists involving energy and matter is the correct answer.
Explanation:
The project that was started to develop atomic weapons during the second world war in US is known as project Manhattan. The project began in 1939 with the support of president Franklin D. Roosevelt. The project was kept secret and not even the vice-president Truman was informed about it. It was only after death of FDR that Truman was informed and given reports about this project. The theories and formulas such as Einstein's mass energy equation was used in the construction of atomic bomb. The scientists working on Manhattan project successfully tested the atomic bomb on July 16, 1945. The first bomb was dropped over Hiroshima on August 6, 1945.
Troops on the British front
Hey there!

The formula for the discriminant is represented by b²-4ac.
We need to identify the values for a, b, and c.
This equation is in general form, which is ax² + bx + c = 0.
So, a = -2, b = -1, and c = -1.
Plug the values into the formula.
(-1)²-4(-2)(-1)
Square.
1-4(-2)(-1)
Multiply.
1-4(2)
1-8
Subtract.
-7
The discriminant is -7.
This means there are no real solutions to the equation, because the discriminant is negative.
Hope this helps!