Question

4x^2+11x-20=0 I have to solve this quadratically as well a many others

Answer 1

the quadratic formula constants here are a=4 ; b=11 ; c= -20
and by substitute in the formula above, you will get the two values of x
and the final answers are x= 5/4 ; x = -4

Answer 2

-4 +- (square root) 896
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22
Or simplified

4 (square root) 14
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22