Question

solve the quadratic equation

Answer 1

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This must be your answer
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Answer 2

by the formula

b sqr -4ac

=(-52)-4×1×640=0

=2704-2560

=144.

-b plus minus root of b sqr -4ac ÷2a

52+- 12÷2

52+12÷2=64÷2=32

52-12 ÷2=40÷2=20