Question

folosind formulele de calcul prescurtat de studiat​

Answer 1

Răspuns:

a)(x+3)²= x² +2×x×3 +2² = x²+6x+4

b)(x-5)²= x²+2×(-5)×x+5²=x²- 10+25

c)(×-6)(×+6)=(ײ-36)

d)(4×-3)²=(4×)²+2×(-3)×4×+3²=16×-24+9

e)(2×+3)²=(2×)²+2×3×2x×+3²=4ײ+12x+9

f)(4x-1)(4x+1)=(16x²-1)

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