Question

द्विघात बहुपद, x2 + 4x - 21 के शून्यक क्या हैं?
$\times 2 + 4 - 21$
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Answer 1

Answer:

In chemistry, a metal is an element that readily forms positive ions (cations) and has metallic bonds. ... Most elements on this line are metalloids, sometimes called semi-metals; elements to the lower left are metals; elements to the upper right are nonmetals.

Step-by-step explanation:

In chemistry, a metal is an element that readily forms positive ions (cations) and has metallic bonds. ... Most elements on this line are metalloids, sometimes called semi-metals; elements to the lower left are metals; elements to the upper right are nonmetals.

Answer 2

Step-by-step explanation:

x²+4x-21

x²+7x-3x-21

x(x+7)-3(x+7)

(x-3)(x+7)

(x-3)=0

x=3

similarly

(x+7)=0

x=-7

x= 3 and -7

hope this helped mate