Question

plzz solve this by completing the square of algebraic expressions?​

Answer 1

Answer:

Step-by-step explanation:

x2-14x-15=0

x2-49+49-14x-15=0

(X-7)SQUARE=49+15

(X-7)SQUARE=56

TAKING SQUARE ROOT,

X-7=UNDERROOT 56

X-7=-2UNDEROOT 14     OR    X-7=2UNDERROOT 14

X=-2UNDEROOT 14 +7           OR           X=2UNDERROOT 14+7

   

Answer 2

Step-by-step explanation:

14+20/2.

=14+10

=24

or

14-20/2

=14-10

=4

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