Question

(2x+5)во второй степени -(2x-3)•(2x+1)=4

Answer 1

(2x+5)²- (2x-3)(2x+1)=4
4x²+20x +25  - (4x²+2x-6x-3)=4
4x²+20x+25-4x²+4x+3=4
24x+28=4
24x=4-28
24x= -24
x=-1
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(2*(-1)+5)²-(2*(-1) -3)(2*(-1)+1)=4
3²- (-5) * (-1)=4
9- 5=4
4=4