(2+5x)(5x-2)+4x(7-6x), x=2

Question

(2+5x)(5x-2)+4x(7-6x), x=2

Answer 1

10х-4+25х^2-10х+28х-24х^2, х=2
10*2-4+25*4-10*2+28*2-24*4=20-4+100-20+56-96=16+80-40=56