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2 answers:
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Answer:
a^2 - b^2
Step-by-step explanation:
a ( a - b ) + b ( a - b (
= a^2 - ab + ba - b^2
= a^2 - ab + ab - b^2
= a^2 + 0 - b^2
= a^2 - b^2
Answer:
See attached for a "Neat" quadratic formula.
a = -1
b = 2
c = 1
x = [-2 +- sqr root( 4 -4*-1*1)] / -2
x = [-2 +- sqr root( 4 -4*-1*1)] / -2
x = [-2 +- sqr root(8)] / -2
x1 = (-2 +2.8284271247) / -2
x1 = .8284271247 / -2
x1 = -0.41421
x2 = (-2 -2.8284271247) / -2
x2 = ( -4.8284271247) / -2
x2 = 2.4142135624
So the equation has the positive solution of
2.4142135624
Step-by-step explanation:
