Question

find all the zeroes of the polynomial 2x raise to 4 + 7x cube -19x square-14x+30 if 2 of its zeroes are root 2 and -root 2

Answer 1

i hope it helpss youuu

Answer 2

When x=2
${2x}^{4} + {7x}^{3} - {19x}^{2} - 14x + 30$
2*2 raise4 +7*2 raise cube +19*2 square+14*2+30
32+56-76-28+30
= 34
When x=-2
2*-2 raise 4+7*-2 raise cube +19*-2square =-14*-2+30
=-132+90
=-42