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f. 2x² + 6x - 20 = 2x² + 4x + 2x - 20
= { 2x² + 4x } + { 2x + 20 }
= x { 2 + 4x } + 1 { 1x + 10 }
h. -16 + 10x + 6x² = - 16 + 6x + 4x + 6
= { - 16 + 6x } + { 4x + 6 }
= x { - 16 + 6 } + 2 { 2x + 3 }
smoga mambantu