Question

8x²-22x-21 solve by completing the square​

Answer 1

$8x {}^{2} - 22x - 21 \\ = > 8x {}^{2} - 28x + 6x - 21 \\ = > 8x {}^{2} - x(28 - 6) - 21 \\ = > 8x {}^{2} - 28x + 6x - 21 \\ = > 4x(2x - 7) + 3(2x - 7) \\ = > (4x + 3)(2x - 7)$

Answer 2

Answer:

=8x²-22x-21

=8x²-28x+6x-21

factorising them

=4(2x²-7)+3(2x-7)

=4x(2x-7)+3(2x-7)

=(4x+3)(2x+7)

hope u understood

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