simplify.
7x + 4{x2 = (5x = 10)} - 3{2 - x2 = (3x2 + x)}
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correct answer is -28 hope it helps you
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Photoelectric effect, phenomenon in which electrically charged particles are released from or within a material when it absorbs electromagnetic radiation. The effect is often defined as the ejection of electrons from a metal plate when light falls on it.
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