Question

solve the following equation by quadratic formula for4 x square - 13 x + 21 is equal to zero ​

Answer 1

Answer:

Here a=4, b=-13 and c=21

b^2=169 and 4×a×c=4×4×13=336

Since b^2 is less than 4ac you will not get real solutions

Because √(b^2-4ac)=√169-336=√-167

Answer 2

4X² - 13X - 21 =0

a=4, b=-13, c=21

QUADRATIC FORMULA :- -b ± √b² -4ac

2a

= -(-13) ± √-13²- 4(4)(21)

2(4)

= 13 ± √169 - 336

8

= 13 ± √-167

8

= 13 + √-167 OR 13 - √-167

8 8

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