Step-by-step explanation:
The answer is 130° since you subtract 4° from both sides
Factor completely. x^2+3x−40
2 answers:
Factorised form: 
Explanation:
This is a quadratic equation, so the easiest way to solve this is by splitting up the middle term. What are two numbers that when multiplied gives -40, and adds to give 3? (8, -5)
You can then split up the middle term like so:
x² + 8x - 5x - 40 = 0
and factorise x² + 8x and -5x -40.
x(x + 8) -5(x + 8) and group together like terms:
Explanation:
This is a quadratic equation, so the easiest way to solve this is by splitting up the middle term. What are two numbers that when multiplied gives -40, and adds to give 3? (8, -5)
You can then split up the middle term like so:
x² + 8x - 5x - 40 = 0
and factorise x² + 8x and -5x -40.
x(x + 8) -5(x + 8) and group together like terms:
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